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English
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Published:
2025-06-02
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448
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1/1
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103
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Not the first one

Summary:

Mafuyu finds out about the relationship between Shin and his brother by accident.

 

Do not use AI on my work.

Notes:

There are probably mistakes, I'm sorry (I'm French)

(See the end of the work for more notes.)

Work Text:

Mafuyu came to see his brother at his lab to repair his blades. That bastard Natsuki didn’t want to go to him, so he needed to take some time to make the reparation for his weapon. Shin was here too, for his gloves. 

After finishing the repair, Mafuyu left the lab to meet with Toramaru.

On his way, he noticed he had left something in the lab.

Annoyed, he turned around.

 Without announcing his presence, he opened the door. His eyes widened when he saw the two people kissing: Shin and his brother. 

The young men parted quickly. Shin looked terrified while Natsuki looked upset.

“Mafuyu, I…”Shin started.

"You're dating my older brother?" Mafuyu frowns.

Shin looks mortified. He averted his eyes many times as if he hesitated to answer him, but nobody can deny what Mafuyu saw earlier. 

 

Why is he dating my big brother? Why didn't I know about it?

 

"I don't have the time to tell you, sorry," Shin answers Mafuyu’s quiet questions.

Mafuyu pouts even more. He feels a bit betrayed by his friend and his brother. He had known about the feelings of each other. They confided in him. He was really happy for them, even though he didn’t tell them. Even if they were annoying about their feelings, he was rooting for them. He would have liked to be the first one to know about them. 

"You are the second person to know!" the blond insists, trying to calm his younger friend.

Mafuyu calms down. 

"Who's the first one?" he inquires. 

"Mr Sakamoto.”

Mafuyu relaxes a bit more. That makes perfectly sense. 

Shin averted his eyes when he didn't try to read his thoughts. Natsuki’s gaze goes from his boyfriend to his brother. It’s like he understands the secret conversation they had through Mafuyu’s thoughts. 

“It’s not a big deal, is it?” he asks nonchalantly.

His brother shrugs.

“No,”

This implied the revelation and also the relationship.  

“Sorry for not letting you know sooner,” Natsuki said. 

Mafuyu sighs. At least the idiots are now together. That’s all that matters. 

"You have weird taste," Mafuyu comments to Shin’s attention.

"Hey!" Natsuki throws something at him that he dodges easily. 

Shin chuckles. Natsuki looks at his lover, and a faint smile blooms on his face. What a rare sight. 

 

What do you like about him? Mafuyu's thoughts wander. 

 

Shin blushes at this question. It was not directed to him, but kind of liked his reaction. It will be so fun to tease him about his relationship with his brother.

“Stop thinking stupid things,” Natsuki threw another unidentified object at his little brother. 

“Stop thinking about our relationship, both of you!” Shin blushes harder.

Notes:

Thank you for reading this ♥