Haruka Sakura has no interest in weaklings, only the strongest fighters. Starting at Furin High, a school known for student brawlers who protect their town, Haruka seeks to battle his way to the top.

When slovenly Amane falls ill after giving his angelic neighbor Mahiru his umbrella in a rainstorm, she steps up to care for him and his messy apartment.

For a high school project, an introverted boy and an outgoing "gyaru" have to pretend to be married — and neither of them are happy about it.