One day, Mr. and Mrs. Sasaki happened to meet again with her husband's student, Ataru. Ataru, who has been secretly in love with his wife Aki for a long time, is invited to his home and drops the key and leaves. The next day, when Ataru comes to pick up the key, the emotions he's accumulated over the years explode and he knocks Aki down. The body does not listen to the intense SEX that hits relentlessly and accepts it. From that day on, Aki refuses to ask for a relationship relentlessly, but the pain in her body deeply shakes her spirit.