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"It's just chocolate, Shinichi-niichan," he purred, crumbling off a piece. Shinichi flinched and tried to duck his head down when Conan came near, but the notes of cacao were inescapable when he waved the piece tauntingly under his nose. The scent burned at the back of his throat.
Conan laughed and threw the piece in his own mouth, chewing loudly so Shinichi could hear it grinding between his molars. "Delicious," he sneered. "As expected from the girl who pours her soul into the mere thought of you."
Shinichi heard movement and screwed his eyes shut. He wanted to be left alone. Conan had to grow bored of this eventually. He didn't want to think about chocolate, or how Ran had toiled over the kitchen stove to make it just for him, or how he hadn't called her to thank her for it, or how he hadn't been able to soothe her when she went to his house to feel for scraps of his presence again.
Then the world blurred, and a breath hitched in his throat as Conan took his bangs in his clutches and peeled him off the floor. "You're not worthy of her," he growled, wagging the rest of the chocolate in his face. "What a waste. Such an outpouring of love should really go to someone much more deserving, don't you agree?" A knowing, pointed smile cut across his cheeks. "And who better than Conan Edogawa, who is there for her when Shinichi-niichan is not?"
Something stirred in Shinichi—the last embers of resistance, perhaps, some instinct to defend his character—but he could only mewl as Conan took his chin in his clawed hand. "Mark my words," he hissed, squeezing the heart-shaped chocolate with noticeable force. "Your world, and everything in it... everything you hold dear, everything you've ever accomplished... will be mine."
There was a crack, followed by a childish giggle. Ran's love-turned-confection shattered in the devil's hands and scattered at its feet like ashes.