In high school, Satsuki was the energetic manager of the baseball team, deeply admiring its captain, Kasashima. She mustered the courage to confess her feelings, but her affection was never reciprocated. Seven years have passed since then—Satsuki is now married and living a happy, stable life. Fate brings her back into contact with Kasashima, and just like in their youth, the two gradually grow closer. Despite overwhelming guilt, their pure emotions spiral out of control, inevitably drawing them into a forbidden affair. This story explores how past desires resurface and reshape the present.