Ai Sayama, A Married Woman Teacher Who Is Raped At Night

While working as a teacher and serving as the advisor for the swimming club, Ai finds the only time she can truly free her mind—the pool at night after club activities end. Wrapped in the quiet of the night and her wet competitive swimsuit, feeling a pleasant fatigue, Ai doesn't want to return to her husbandless home and ends up masturbating in the locker room. But a delinquent student witnesses her doing it... The student can't stop staring at her voluptuous breasts spilling out of the swimsuit. Ai didn't know at the time that the pleasure of being raped would come to dominate her nights...