Natsumi, a mother-in-law who lives with Yoshio, who is a stepchild of her husband, in a house where her husband is away from home. Lately, I've been wondering about Yoshio's gaze. I thought of him as the opposite sex. However, Yoshio was delusional about Natsumi's obscene dementia. Eventually, the feelings of the two will be transmitted and they will become a man and a woman who want each other madly. Don't tell your father...
