My mother's friend

Atsushi is a repeater who helps out at his family's cafe. One day, while her mother is on a trip, she ends up having to go to the store with her mother's friend Miyuki. Atsushi is constantly nervous, but Miyuki feels excited by his innocence from her bondage husband, and she invites him out of her innocence. From that day onwards, they found time to devour each other's pleasures, enjoying the pleasures of each other. However, the two of them, full of immorality, wouldn't last very long...