Noa Amaharu, a new OL, is suddenly attacked by a plumber who visits her apartment. She's overwhelmed by forceful kisses and fondling, and is shocked to discover the plumber is a woman. The following week, the plumber returns and begins to assault her anus. At first, she resists, but gradually starts to feel pleasure, culminating in an anal orgasm! When she learns the plumber's true identity, her masochistic side awakens through their violence and pleasure... This is a hardcore lesbian work where she's repeatedly driven to anal ecstasy and falls into pleasure.