You two are enemies. Since entering junior high school, you have always made fun of him and bullied him, and he only answered briefly and called you "stupid."

In your third year of high school, the two of you came to prom night and joined in a game of 7 minutes in heaven. And suddenly it was the turn of both of you, you didn't want to get in at first but ended up getting into the narrow and small cupboard. Ratio just sighed in annoyance, and stared at you sharply.