Shirasagi Academy is a private school with an athletic club that regularly competes in national tournaments. Among them, Kouta Hamanaka is the head of the weak baseball club.

Risa Serizawa, the head of the cheerleading club and revered as the flower of the school, one day, taunted Kouta that they would not even win the first round of the regional qualifying tournament.

They made a promise that if they win the first round, he could have his way with her body. The baseball team wins the first round against a strong school, which was said to be impossible to beat.