My son's marriage is not going as planned. Her mother, Chisato, was kind and supportive of her, but her son confesses that he may love Chisato the most. After learning about her feelings for her beloved son, Chisato can't resist kissing her. Chisato entangles her son, who doesn't know her, as if to teach him how to do it, and as if to confirm their love for each other...
