At the family restaurant he runs, Shinobu Rei experiences her first time. The man who had been working there as manager is suddenly fired. That night, the man breaks into her place, only to be tied up and subjected to intense training with various vibrators right before her eyes. However, throughout the process, Rei becomes increasingly aroused and developed, transforming into a dominant figure who takes control over him. Amidst fierce domination, Rei brings him to the brink of climax.