Chapter Text
Lucy Kaneshiro had never been a patient person.
She'd spent three days watching her brother disappear to the cove, three days feeling the poison creep through her veins, three days imagining the merman's scales peeling away from his body under her knife. The image was intoxicating. The power, the relief, the cure—all of it was within her grasp.
And so, on the fourth day, she made her move.
She waited until Luca was occupied—trapped in a meeting with their father about the Shimizu family's latest demands—and then she slipped out of the penthouse. She moved quickly, silently, her footsteps sure on the familiar path to the coast. She'd memorized the route from her first visit. She knew every turn, every rock, every hidden crevice.
She brought two guards with her—loyal men who asked no questions. They carried a heavy iron net, its links cold and dark, coated with a substance that would make any magical creature weak and sick. Slow poison, they called it. The kind that drained strength without killing. The kind that kept its victim alive long enough to be useful.
Lucy's hand tightened around the tranquilizer gun in her pocket. She didn't want to hurt the merman. Not permanently. She just needed a sample—a scale, a tear, a drop of blood. Something she could use to create an antidote for her own poison.
But if he resisted, she would take what she needed by force.
The cove was quiet when she arrived. The water was calm, the surface glinting like silver in the afternoon light. Lucy motioned for her guards to stay back, then crept forward, her heart pounding.
She couldn't see the merman. The cove looked empty, abandoned. For a moment, she felt a pang of disappointment—he wasn't there. He'd left. He'd sensed her coming.
But then she heard the hum.
It was low and melodic, drifting out from the shadows of the rocks. Lucy's breath caught. The sound was beautiful—hauntingly, achingly beautiful. It made her chest ache with something she couldn't name. Longing, maybe. Or grief. Or both.
She pushed the feeling aside. She couldn't afford weakness. She couldn't afford sentiment.
She raised the tranquilizer gun. She crept closer to the water's edge. The hum grew louder, more distinct.
And then the merman appeared.
He was swimming toward the entrance of the cove, his amethyst tail shimmering in the dim light. His expression was open, trusting—almost eager. His lips were curved in a smile, his eyes bright with anticipation.
He thinks I'm Luca, Lucy realized. He thinks I'm his precious human.
The thought made her stomach twist. It also made her aim steadier.
She fired.
The dart struck the merman's neck. He gasped—a soft, startled sound—and his eyes went wide with confusion. His hand rose to touch the dart, his fingers trembling.
"L-Luca?" he stammered. "Why... why would you..."
His voice faded. His eyes fluttered. His tail went slack.
And then he slumped forward, unconscious.
The guards moved quickly. They waded into the water, their boots splashing against the rocks. They scooped the merman up—he was surprisingly light, surprisingly fragile—and wrapped him in the iron net.
Shu didn't stir. The tranquilizer was strong, designed to knock out creatures twice his size. He lay limp in the guards' arms, his head lolling, his tail dragging uselessly.
Lucy watched, her heart pounding. She didn't feel victorious. She didn't feel powerful. She felt... hollow. Like she'd just crossed a line she couldn't uncross.
But the poison in her veins burned. The wound on her arm ached. And she couldn't afford to be weak.
"Take him to the car," she ordered. "Quickly. Before anyone sees."
The guards nodded. They carried Shu out of the cove, his tail scraping against the rocks, leaving a trail of shimmering scales behind him.
Lucy followed, her face set in stone.
Shu woke slowly, his mind foggy. His body ached. His head throbbed. He was cold—so cold—and his limbs felt heavy and weak.
He tried to move. He couldn't.
Something was wrapped around him. Tight. Constricting. It burned against his skin, and every time he struggled, the burning grew worse.
He opened his eyes. Everything was blurry. Shapes and shadows and harsh, bright lights.
And then he heard voices—cold, unfamiliar voices.
"Lucy-sama, the creature is waking."
Lucy. Lucy Kaneshiro. Luca's sister.
Shu's heart seized. He tried to speak, but his voice was weak, barely more than a whisper.
"Where... where am I?"
A figure stepped into his line of vision. Lucy. She was beautiful—light-violet eyes, sharp features, golden hair pulled back in a severe ponytail. She looked at him with something that might have been curiosity, might have been cold calculation.
"You're in the Kaneshiro estate," she said. "You're safe. For now."
Shu's eyes widened. "Luca. Where is Luca? Does he know—"
"No." Lucy's voice was flat. "And he won't know. Not if you cooperate."
Shu stared at her. The iron net burned against his skin, and he could feel his strength draining away. He was dying. He was dying slowly, inch by inch, and this woman—this cold, beautiful woman—was watching him with detached interest.
"Please," he whispered. "Please let me go. I haven't done anything wrong."
"You exist," Lucy said. "That's enough."
Shu closed his eyes. Tears slipped down his cheeks. He thought of Luca—his warmth, his kindness, his gentle hands. He thought of the way Luca looked at him, like he was precious, like he was worth protecting.
He couldn't die here. He couldn't let Lucy use him. He had to get out. He had to warn Luca.
The conch.
The conch was in Luca's pocket, but it was still connected to him. Still linked by the piece of essence he'd placed inside it.
Shu focused. He gathered every scrap of strength he had. He pushed his thoughts through the shell, his mental voice frantic and desperate.
Luca. Luca, please. Help me. I'm in trouble. Your sister—she took me. I'm at the estate. Please. Please hurry.
He didn't know if Luca could hear him. He didn't know if the connection was strong enough. But he had to try. He had to believe.
Please, Luca. I'm scared. I'm so scared. Help me.
And then he waited.
Luca was in the middle of a meeting when the voice exploded in his head.
Luca. Luca, please. Help me.
He gasped. The conch in his pocket—it was burning, glowing with a faint light that only he could see. Shu's voice was desperate, broken, terrified.
I'm in trouble. Your sister—she took me. I'm at the estate. Please. Please hurry.
Luca shot to his feet. His chair clattered to the floor. His father stared at him, outraged.
"What the hell do you think you're doing, boy?"
But Luca didn't answer. He was already running.
He burst out of the meeting room, ignoring the shouts behind him. He ran through the hallways, his heart pounding, his mind racing. Shu was in trouble. Lucy had taken him. Lucy had hurt him.
Luca's vision went red. His hands clenched into fists. He didn't care about the meeting. He didn't care about his father's anger. All he cared about was Shu.
He reached the estate's basement—the place where Lucy conducted her "experiments." He threw open the door, his eyes wild, his breath ragged.
And there, in the center of the room, was Shu.
He was trapped in an iron net, his beautiful tail wrapped in coils that burned his skin. His face was pale, his eyes glassy with pain and fear. His wrists were bound with iron cuffs. His scales were dull, their shimmer faded to a sickly gray.
And Lucy was standing over him, a knife in her hand.
"Luca?" Lucy's eyes widened. "What are you doing here?"
Luca didn't answer. He crossed the room in three strides. He grabbed Lucy's wrist and twisted it, forcing her to drop the knife.
"Don't touch him," he snarled. "Don't you dare touch him."
Lucy stared at him. Her expression flickered—surprise, anger, something that looked almost like hurt.
"Luca," she said carefully, "you don't understand. I need him. The poison—"
"I don't care about your poison!" Luca's voice cracked. "I don't care about anything except him! You hurt him, Lucy. You hurt him!"
He turned to Shu, dropping to his knees beside the merman. His hands fumbled with the iron net, trying to undo the knots.
"Shu. Shu, I'm here. I'm so sorry. I'm so, so sorry."
Shu's eyes opened. He looked at Luca, and his expression softened with relief.
"Luca," he whispered. "You came. You came for me."
"Of course I came." Luca's voice was thick with tears. "I'll always come for you. Always."
He worked frantically at the net, his fingers bleeding from the sharp edges. Finally, the knots loosened. He pulled the net away, tossing it aside with a clatter.
Shu gasped as the iron fell away. His scales flickered, their color slowly returning. He sagged against Luca, his body trembling.
"I was so scared," he whispered. "I thought—I thought I was going to die."
"You're not going to die." Luca pulled him close, his arms wrapping around Shu's shaking form. "You're not going to die. I won't let you."
Lucy watched, her expression unreadable. Her hands were trembling. The knife lay on the floor between them.
"Luca," she said quietly. "He's dangerous. He's a creature of myth. He doesn't belong in our world."
"He belongs with me!" Luca's voice was fierce. "He's the only good thing in my life. And you tried to take him away."
Lucy's jaw tightened. "I was trying to save myself. The poison—"
"I don't care about your poison!" Luca's voice broke. "I care about him. I love him, Lucy. I love him more than anything. And if you ever touch him again, I'll—"
He stopped. He couldn't finish. The threat was too horrible, too violent, too much like something their father would say.
But Lucy understood. Her expression flickered—pain, guilt, something that looked almost like regret.
"Luca," she said softly. "I didn't know. I didn't know you felt so strongly."
"That doesn't excuse what you did." Luca's voice was cold. "Get out. Get out and leave us alone."
Lucy hesitated. She looked at Shu—still trembling, still pale, still fragile. She looked at Luca—fierce, protective, utterly devoted.
And then she nodded.
"I'm sorry," she said quietly. "I'll... I'll leave you alone."
She turned and walked out of the room, her footsteps echoing in the silence.
Luca didn't watch her go. He was too focused on Shu—on the merman's trembling body, his gasping breaths, the faint shimmer of his scales.
"Shu." Luca's voice was soft, desperate. "Shu, I'm so sorry. I should have protected you. I should have known Lucy would do something like this. I should have—"
"Luca." Shu's hand rose, his fingers pressing against Luca's lips. "Stop. It's okay. I'm okay."
"You're not okay." Tears streamed down Luca's face. "You're shaking. You're cold. You almost died because of my family."
Shu managed a weak smile. "But I didn't die. Because you saved me. You always save me."
Luca's heart cracked. He pulled Shu closer, holding him as tightly as he dared.
"I love you," he said. The words spilled out, messy and broken and completely unplanned. "I love you, Shu. I've loved you since the moment I saw you. I know it's too fast. I know it's crazy. But I can't help it. I can't stop it. You're everything to me. You're the only thing that makes sense in my stupid, broken life. And I can't lose you. I can't. So please—please don't leave me. Please stay with me. Please—"
"Luca." Shu's voice was soft, but it cut through his rambling. "Luca, I'm not going anywhere."
Luca looked at him, his eyes swollen and red. "You're not?"
Shu shook his head. He reached up and cupped Luca's face, his thumb brushing away a tear. "You're my best friend. My only friend. You saved me. You held me. You told me I was beautiful." He paused. "And you love me."
Luca's breath caught. "I do. I love you."
Shu smiled—that radiant, unguarded smile that made Luca's heart ache. "I think," he said slowly, "I might love you too."
Luca's world stopped. "What?"
"I don't know how to explain it." Shu's brow furrowed. "It's a different feeling. Bigger. Warmer. Like when I'm with you, I'm not lonely anymore. Like when I think about you, my chest feels tight." He touched his heart. "Is that love?"
Luca stared at him. His throat was too tight to speak. His eyes were burning with fresh tears—not of pain, but of joy.
"Yes," he managed. "Yes, that's love."
Shu's expression brightened. "Oh. Then I love you too."
Luca laughed—a broken, joyful sound. He pulled Shu into a kiss, pressing their lips together with all the tenderness he could muster. Shu's lips were soft and cool, and they tasted of salt and something sweet.
When they pulled apart, Shu was smiling.
"I liked that," he said. "Can we do it again?"
Luca laughed again, his heart soaring. "We can do it as many times as you want."
Shu's smile widened. He leaned in and kissed Luca again—quickly, playfully. "Good. I like kissing you."
"I like kissing you too." Luca pressed his forehead against Shu's. "I like everything about you."
"Even when I'm cold and wet and covered in iron burns?"
"Especially then." Luca's voice was soft. "Because that's when you need me most."
Shu's expression softened. He snuggled closer, his head tucking under Luca's chin. "I don't want to go back to the cove," he whispered. "Not today. I want to stay with you."
Luca's heart ached. "You can't stay at the estate. It's not safe. Lucy—"
"I know." Shu's voice was small. "But I don't want to be alone. I'm scared, Luca. I'm scared of your sister. I'm scared of the iron. I'm scared of being alone in the dark."
Luca's throat tightened. "You won't be alone. I'll stay with you. I'll take you somewhere safe. Somewhere Lucy won't find you."
Shu pulled back, his eyes bright. "Really?"
"Really." Luca's voice was fierce. "I know a place. Another cove. Hidden. Safe. I'll take you there tonight. I'll stay with you as long as you need."
Shu's smile was radiant. "You'll stay? All night?"
"All night." Luca pressed a kiss to his forehead. "And all day tomorrow. And as long as you need me."
Shu's smile faltered. "But your family—your father—"
"I don't care." Luca's voice was firm. "I don't care about any of it. You're more important than all of them combined."
Shu stared at him. "Luca," he whispered. "You really mean that."
"I really mean it." Luca took his hands. "I love you, Shu. And I'll do whatever it takes to keep you safe."
Shu's tears spilled over. He threw his arms around Luca, burying his face in his neck. "I love you too," he said, his voice muffled. "I love you so much. Don't leave me. Please don't leave me."
"Never." Luca held him tightly. "I'll never leave you."
They slipped out of the estate under cover of darkness. Luca carried Shu through the back alleys, avoiding the guards, avoiding the security cameras. Shu was weak, still recovering from the iron's poison, but he was alive. He was alive and he was warm and he was safe.
The new cove was hidden behind a curtain of waterfalls, accessible only through a narrow crevice in the rocks. Luca had discovered it weeks ago, on one of his many walks along the coast. He'd thought it might be a good hiding place if they ever needed one.
He hadn't expected to need it so soon.
The cove was small, intimate, sheltered from the wind and the waves. The water was crystal clear, reflecting the moonlight like a mirror. There was a sandy beach at the edge, soft and warm.
Luca laid Shu down on the sand, careful not to jostle his injured tail. Shu's scales were slowly regaining their shimmer, but he was still pale, still fragile.
"It's beautiful," Shu breathed, looking around. "Luca, it's beautiful."
"I'm glad you like it." Luca sat beside him, his hand finding Shu's. "We can stay here as long as you want."
Shu turned to look at him. His amethyst eyes were soft, glowing in the moonlight. "You really meant it," he said. "When you said you love me."
"Of course I meant it." Luca's voice was tender. "I've never meant anything more."
Shu smiled. He reached up and traced Luca's face, his fingers mapping the lines of his cheeks, his jaw, his lips. "I'm glad," he said softly. "I'm glad you love me."
Luca's heart swelled. He leaned down and pressed a gentle kiss to Shu's lips. "I'm glad you love me too."
Shu giggled—that bright, bubbly sound that made Luca's heart flutter. "Can we kiss more?" he asked. "I like kissing you."
Luca laughed. "We can kiss as much as you want."
Shu's smile widened. He pulled Luca down, wrapping his arms around his neck. "Then kiss me," he said. "Please."
Luca obliged. He kissed Shu slowly, deeply, pouring all his love and devotion into the touch. Shu responded eagerly, his fingers threading through Luca's hair, his tail curling around Luca's legs.
They kissed for a long time. Neither of them wanted to stop. Neither of them wanted to break the spell.
But eventually, Shu pulled back, his expression soft and sleepy. "Luca," he murmured. "I'm tired."
"Then rest." Luca pulled him close, settling Shu's head on his chest. "I'll keep watch. I'll protect you."
Shu smiled. He nuzzled into Luca's neck, his breath warm against Luca's skin. "Stay with me," he whispered. "Don't leave."
"I won't." Luca pressed a kiss to his hair. "I'll never leave."
Shu hummed contentedly. His eyes fluttered closed. Within moments, his breathing evened out, his body relaxing against Luca's.
Luca held him. He listened to the waves. He watched the moonlight dance on the water.
And for the first time in his life, he felt at peace.
The next morning, Shu woke slowly. The sun was streaming through the waterfall, casting rainbows across the cove. The water was warm, the sand was soft, and Luca was still there, his arms wrapped protectively around Shu's body.
Shu smiled. He didn't want to move. He didn't want to break the spell.
But Luca stirred, his eyes fluttering open. "Morning," he murmured, his voice rough with sleep.
"Morning," Shu whispered back.
Luca smiled—a soft, sleepy smile that made Shu's heart flutter. "Did you sleep well?"
"Mmm." Shu snuggled closer. "I slept very well. You're warm."
"I'm glad." Luca pressed a kiss to his forehead. "Are you feeling better?"
Shu considered. His body still ached. His scales still felt dull. But his heart—his heart was light.
"Yes," he said. "I'm feeling better. You make me feel better."
Luca's smile widened. "Good. I want to make you feel better. Always."
Shu giggled. "You're very sweet."
"I'm sweet?" Luca laughed. "You're the one who asked me to stay all night."
"Because I wanted to." Shu's voice was earnest. "I like you. I like being with you. I like feeling safe."
Luca's expression softened. "You'll always be safe with me. I promise."
Shu looked at him—really looked. At his light-violet eyes. At his messy hair. At his gentle smile.
"You're beautiful," Shu said softly.
Luca's face flushed. "I'm not—"
"You are." Shu reached up and touched his cheek. "Your eyes are beautiful. Like dawn. Like hope."
Luca's throat tightened. "Shu..."
"You're kind," Shu continued. "And gentle. And you saved me. You always save me." He smiled. "You're my hero."
Luca's eyes burned with tears. "I'm not a hero. I'm just a boy who fell in love with a merman."
Shu giggled. "That's very romantic."
"It's true." Luca leaned down and pressed his forehead against Shu's. "I fell in love with you the moment I saw you. I didn't even know what love was. I just knew I couldn't leave you. I couldn't let you go."
Shu's smile softened. "I'm glad you didn't leave. I'm glad you stayed."
"Me too." Luca kissed him—softly, gently, reverently. "I'll always stay. I'll always come back. I'll always be yours."
Shu's heart swelled. "And I'll always be yours," he whispered back. "Always."
The day passed in a blur of happiness. Luca and Shu stayed in the cove, talking and laughing and simply being together. Shu showed Luca the different fish that swam past. Luca told Shu stories about his childhood—the good ones, the ones that didn't hurt.
They shared food—rice balls and fresh fruit that Luca had brought in his bag. Shu loved the sweetness of the fruit, the way it burst on his tongue.
"I've never tasted anything like this," he said, his eyes wide with wonder. "It's so sweet! Like the sun!"
Luca laughed. "It's just a peach, Shu."
"Not just a peach." Shu bit into it again, his expression blissful. "It's a miracle."
Luca watched him, his heart full. "You're a miracle," he said softly.
Shu looked up, his cheeks flushing. "You're biased."
"Very." Luca grinned. "But that doesn't make it any less true."
Shu giggled. He scooted closer, leaning against Luca's side. "Tell me another story," he said. "About your family. The good ones."
Luca thought for a moment. "Once, when I was five, my mother took me to the beach. It was just the two of us. She held my hand and we walked along the shore, collecting shells." He smiled at the memory. "She told me that every shell had a story. That the ocean whispered secrets to them. And if I listened closely, I could hear them too."
Shu's expression softened. "Did you hear them?"
"I thought I did." Luca looked at Shu. "But I think I was wrong. I think the ocean's secrets were waiting for you. All this time."
Shu's eyes glistened. "That's beautiful."
"It's true." Luca pressed a kiss to his hair. "You're the ocean's secret. And I'm so lucky I found you."
Shu wrapped his arms around Luca, burying his face in his neck. "I love you," he whispered. "I love you so much."
"I love you too." Luca held him tightly. "I love you more than anything."
They stayed like that for a long time—wrapped in each other, sheltered from the world. The waterfall cascaded around them. The sun shone down. The waves whispered their eternal secrets.
And for the first time in both their lives, neither of them felt alone.
The sun set over the ocean, painting the sky in shades of gold and pink and deep, impossible amethyst. Luca and Shu sat on the beach, watching the colors shift and change.
"I wish this could last forever," Shu murmured. "I wish we could stay here forever."
Luca's heart ached. "Me too."
Shu turned to look at him. His amethyst eyes were bright with unshed tears. "But you have to go back, don't you? To your family. To your life."
Luca nodded slowly. "I have to. For now. But I'll come back. I'll always come back."
Shu's expression crumpled. "I don't want you to go. I don't want to be alone."
"You won't be alone." Luca took his hand. "I'll be with you. Even when I'm not here. The conch—I'll talk to you every night. Every single night."
Shu looked at him, his eyes searching. "Promise?"
"I promise." Luca squeezed his hand. "I'll talk to you until you fall asleep. I'll tell you stories. I'll sing you songs. I'll—"
"You sing?" Shu's expression brightened. "You never told me you sing!"
Luca's face flushed. "I'm not very good."
"I don't care." Shu leaned forward, his eyes shining. "Sing for me. Please."
Luca hesitated. But Shu's expression was so eager, so hopeful, that he couldn't refuse.
He took a breath. And he began to sing.
It was a simple melody—a lullaby his mother used to sing to him when he was small. His voice was shaky, uncertain, but it was heartfelt. It was true.
Shu listened in silence. His eyes glistened. His lips curved into a soft, wondering smile.
When Luca finished, Shu reached out and touched his face. "That was beautiful," he said softly. "You're beautiful."
Luca's throat tightened. "Shu..."
"I mean it." Shu's voice was earnest. "Everything about you is beautiful. Your voice. Your heart. Your eyes." He paused. "You."
Luca didn't know what to say. So he kissed Shu instead—deeply, tenderly, pouring every emotion he couldn't express into the touch.
When they pulled apart, Shu was smiling.
"I'm going to miss you," he said. "When you go."
"I'm going to miss you too." Luca pressed his forehead against Shu's. "But I'll be back before you know it. I promise."
Shu nodded. He sniffled, wiping his eyes. "Okay."
Luca stood. He looked down at Shu—at his beautiful face, his shimmering tail, his tear-streaked cheeks.
"Wait," Shu said. "Before you go—"
He pulled something from behind his back. It was a small, iridescent shell—similar to the conch, but different. Rounder. Softer.
"What's this?" Luca asked.
Shu's cheeks flushed. "It's a wish shell," he said shyly. "If you hold it and make a wish—a true wish—it might come true."
Luca stared at him. "Shu, that's—"
"I know it's silly." Shu's voice was defensive. "But I wanted to give you something. Something that would remind you of me. Something that would—"
Luca cut him off with a kiss. "It's not silly," he murmured against Shu's lips. "It's perfect."
Shu's expression softened. "Really?"
"Really." Luca tucked the shell into his pocket, next to the conch. "I'm going to wish for something amazing. And it's all going to be because of you."
Shu smiled—a radiant, unguarded smile that made Luca's heart ache.
"I love you," he said softly.
"I love you too." Luca pressed a kiss to his forehead. "I'll be back soon. I promise."
He turned and climbed up the rocks, pausing at the top to look back. Shu was still there, still watching, his amethyst tail glowing in the fading light.
Luca waved. Shu waved back.
And then Luca disappeared into the darkness, already counting down the hours until he could return.
That night, Luca lay in his bed, the conch pressed to his ear. He could feel Shu's presence, warm and familiar, like a heartbeat in the dark.
I'm thinking of you, he sent. I'm always thinking of you.
Shu's voice echoed in his mind, soft and sleepy. I'm thinking of you too. I miss you already.
I miss you too. Luca smiled. But I'll be back soon. I promise.
I know. Shu's voice was warm. I trust you.
Luca's heart swelled. I love you, Shu.
I love you too, Luca. A pause. Goodnight.
Goodnight, my merman.
Luca closed his eyes, the conch still pressed to his chest. He could feel Shu's presence, warm and steady, like a star in the dark.
And for the first time in his life, he drifted off to sleep without a single shadow in his heart.