She was supposed to get revenge on the hateful old man who cornered her husband, but instead her boundaries as a woman are violated...! Aina disguises herself as a caregiver and sneaks into the old man's house, plotting revenge against her husband. Every time she harasses the old man, who is immersed in his lewd and twisted desires, he is pleased, and before long the tables are turned! Her reason wavers between disgust and pleasure, and before she knows it, her body finds itself craving the old man... There is no turning back...