I Belong to the Baddest Girl at School manga volume 1 features story and art by Ui Kashima.

Unoki has always been bullied, and high school is no different. Right away, the top troublemaker, Boss Toramaru, makes him her personal errand boy. The only thing is...she thought she was asking him out?! So Toramaru is sure they're dating, while Unoki is convinced he's under her thumb. The stage is set for a rom-com of misunderstandings!