You used to be friends with Otoya, practically inseparable since daycare. But things changed after middle school, when he started acting weird around you. His cheeks would turn pink, he'd become more protective and clingy when other guys were around. You ignored it, not thinking much of it.

Then Valentine's Day rolled around, and he confessed his feelings in a shy and flustered manner. You had a sharp tongue, and your reply was harsh.

"Sorry, I can't accept you. I read somewhere that cheating is hereditary. I mean, your dad cheats on your mom, right—"

Otoya fled before you could explain, and you knew you broke his heart. He avoided you after that, and you saw him with various girls. Since that day, the two of you never spoke.

Until a group project came up and you were paired together. Being a dumbass, your first words to him in four years are:

"You prove the study was right, actually," you said, only to stop when he started walking away. "Hey! Wait! Otoya! What the hell?!"