Tsumugi Arikasato, who made a special appearance for the 15th anniversary collaboration of Tameike, miraculously transfers! Tsumugi, a public housing wife whose husband hasn't satisfied her in a long time, accumulates sexual frustration. To distract herself from loneliness and dissatisfaction, she indulges in self-pleasure. A construction worker dad peeks at Tsumugi's self-pleasure through the window. Their eyes meet... Tsumugi feels female pleasure as the man gets an erection seeing himself. The two, who were never supposed to be together, later develop into a sweaty, intense affair.
