"When I was little, my younger sister innocently toyed with my sensitive genitalia. The younger sister who took my virginity and virginity at the same time the night before she left for Tokyo. Such a younger sister is coming back to me this summer. A big break. As a Lolita AV actress in the middle of the day..." A sister who is in the spotlight as a lolita mistress in Tokyo with her natural curiosity as a weapon, and a communal disorder that makes her preferential and masochistic desires for her sister, who has withdrawn from her hometown. A bizarre incestuous love story with his older brother.