Maki Hojo hired a private tutor, Saishi, for her daughter Rumina, who was doing nothing but playing around. However, the moment Rumina saw Saishi, she fell head over heels in love and began trying to seduce him instead of studying. Unaware of the situation, Maki brought tea to their room and opened the door—only to witness her daughter having sex with the tutor. Hearing her daughter's moans, Maki, who had been suffering from a sexless marriage, felt not anger but overwhelming arousal, her pussy getting wet with excitement. Driven by her own pent-up desires, she made up her mind to seduce Saishi the next time Rumina was out of the house.