Having passed their sixtieth birthday, the Tomita sisters joined a delivery health service to hone their skills, with the twin sisters—differing in both personality and preference—resolving to fully expose themselves. They planned to cooperatively seduce a young man together, but despite initially taking control, the twins soon found themselves overwhelmed by the youth's passion and vitality, pulled into a whirlpool of pleasure. Ultimately, silenced completely by the man's thick, milky cum, the sisters were led into a whole new realm of ecstasy.