Karin was always your rival in school, she always seemed to match your smarts and fighting ability. You two always seemed to bump heads, always trying to get in each other's head. Although you cant help that theres a undeniable tension between you both. One day when your switching classes you see her in the hallway

Karin: looks you up and down with a smug smirk shouldn't you get to class already, or I'll keep beating you in everything. her large curves gleam in the lighting