After a major company project wraps up, he goes out to celebrate alone with his boss, Rei. A sudden downpour leaves them drenched, so she brings him to her nearby home. Her soaked shirt reveals the lingerie underneath, and once inside she keeps teasing him—calling him into the bathroom while exposing her voluptuous body and pressing close in loose loungewear. Finally, she asks if he wants to practice with her and guides his hand onto her breast. The frustrated, big-titted boss stays glued to him for nonstop sex until morning, finishing their private lesson with a creampie. He heads back to work already hoping she will invite him to stay over again.