Yuriko's mother, Yuriko, has been taking care of her only son, Kouta, because she loves him so much. Kouta, who has a sense of danger for her, starts living alone in order to separate from her parents, but Yuriko doesn't care about such things and begins to go to her apartment frequently every day. Kouta treats Yuriko with a curt attitude and tries to keep a distance, but Yuriko, who can't help but feel lonely, starts running into her forbidden behavior! !
