Season 1

Ashiya Mizuki is a girl but she attends an all-boys school because high jumper Sano Izumi is there.

The school doctor Umeda and Sano figure out that Mizuki is a girl. Can she continue staying at the school?

After Sano stops his friend Rika from slapping Mizuki and yells at Rika, Mizuki and Sano get into a fight.

Sano decides to rejoin the track team, but then his old rival Kagurazaka shows up to provoke him.