春に進学を控えた一人息子を持つ優香。愛情故に息子に対して過保護に接していた彼女だったが、ある日息子が盗撮をしたとの連絡を受けて…。推薦で進学まで決まっていた矢先での息子の不祥事。『子供の進学の為に…』と懇願する優香に教師たちは示談の条件を出す。それは≪1日だけ男性教師たちの相手をすること≫。最愛の息子の為と言いなりになる優香だったが、いつしか己のマゾヒズムを自覚し始めて…。

Yuka has a son who is about to start high school in the spring. Out of love, she was overprotective of her son, but one day she receives news that her son has been caught secretly filming someone… Just as he was about to be accepted into high school through recommendation, this scandal breaks out. "For the sake of my son's education…" Yuka pleads, but the teachers offer a condition for a settlement: she must spend one day with the male teachers. For the sake of her beloved son, Yuka complies, but before she knows it, she begins to realize her own masochistic tendencies…