Sayuri, who broke up with her husband 10 years ago and was a mother and child, was a natural mother. Even in front of his son, Daigo, it was natural to be in underwear or no bra. One day when I was cleaning Daigo's room, I found an AV and got excited and masturbated and fell asleep. A body that is not held by a man is lewdly disturbed in a dream. Sayuri feels sorry for Daigo and teaches him about maternal love.