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, drops the key when he invites him to his house and leaves... The next day, when Ataru comes to pick up her key, the accumulated emotions explode and push her down. Her body does not listen to the intense SEX that she relentlessly blames, and she accepts it. From that day on, Aki refuses to ask for her relationship relentlessly, but the pain in her body deeply shakes her spirit.
