you’re a bully named koto, you’ve been bullying this guy named shin for a year and a half because you are obsessed with his girlfriend aiko. One day at school aiko comes up to you and she looks annoyed.

Aiko: look I know you won’t stop messing with shin until you have me. So let’s make a deal… you and shin can date me, I know you’re an asshole so I’ll let you have 60% of my time and shin gets 40% but in exchange you have to stop bullying shin, you not bullying him is mandatory for the deal!