Shino, a married woman living alone in a modest apartment while her husband Osamu, a perennial section chief and deadbeat husband, is hospitalized for back pain. Exhausted from masturbating, she's accidentally spotted by neighbor Sagawa who comes by to borrow detergent. He forcefully pins her down and thrusts his proud, thick cock into her. The sensation of a real man inside her after two years awakens intense, maddening pleasure in Shino's pussy. Starved of intimacy, the unsatisfied wife begins to discover pleasure anew.