Tsubomi Mochizuki & Riisa Kisaragi's W-Lesbian Debut. It's summer, and the setting is her husband's family home. The stepsisters, Tsubomi and Riisa, find themselves drawn to each other in a way they can't quite explain. Despite the awkwardness, they crave each other's touch again and again in a passionate lesbian affair. Their husbands are brothers, making them close relatives, but they're left alone at the family home while the men are out golfing and their mother-in-law nags them relentlessly. With nowhere else to go, the two women's distance slowly closes, leading to intense, sweaty lesbian sex in the traditional Japanese room, the bath, and on the veranda. It's a secret relationship, just for one summer, shared only by women.