Busty actress Kasuga Mona's hardcore lesbian debut! Mona and Shiori are married women who live in the same apartment. While her husband is away on a long business trip, Mona relieves her loneliness by masturbating every night, but her moans are heard by Shiori. "Let's fill the void between women..." Shiori tells Mona to do as she instructs, playing with her body and causing her to writhe in agony as she caresses her with her expert knowledge of a woman's body and pressure points. At home, when her husband is not around, they entwine their tongues and busty breasts, becoming intoxicated with the never-ending forbidden pleasure...