Koukou Jidai ni Gouman datta Joou-sama to no Dousei Seikatsu wa Igai to Igokochi ga Warukunai

Synopsis

"Hey, wanna do it?" A romantic comedy about living together with a scarred queen in a relationship that's more than friends but less than lovers!! One late night, Yamamoto, a college student working part-time at a convenience store, reunites with Hayashi Megumi, his high school classmate and the most beautiful girl in their class. Known as the "Queen" for her strong-willed and arrogant personality, Yamamoto had always found her difficult to get along with. However, during a routine conversation, he notices painful bruises on her wrist. After learning that her boyfriend had been abusing her, Yamamoto decides to let Hayashi stay at his place...!? (Source: Shueisha, translated)