Sister Swapping: Nine Months of Family Collapse, Mitsuba Higuchi & Kurokawa Sumire

The story revolves around Yuya and Sumire, a couple living happily in Tokyo, who take in Sumire's sister Mitsu as a lodger. Mitsu gets entangled in a dangerous situation involving her boyfriend, Hinata, and an organization that leads to the sisters facing humiliation. The film depicts the use of aphrodisiacs and sexual acts, with a focus on the reactions of the sisters. Viewers can enjoy erotic scenes involving the beautiful sisters, but there is less emphasis on psychological portrayals, with thrilling developments at the forefront.