Tatsuya, a beloved son who was raised by a single woman, will get married. - The feelings of her mother, Chizuru, were complicated. - She wants her to be happy with her favorite woman, but she doesn't want to give her cute son to anyone. - Too deep parent-child love leads them to a forbidden world. - Her mother's vagina gently wraps her son's penis. - Her mother, her son, and her fiancée ... the fate of the three is intricately intermingled ...