Tatsuya, a nephew, comes to visit his aunt who works at a local factory. It's been a while since he last saw his aunt, who is as beautiful as ever and warmly welcomes him. That night, exhausted from driving unfamiliar to him, Tatsuya wakes up and hears a noise coming from the factory. He peeks in fearfully and sees his aunt and the employees in lewd poses... Since then, Tatsuya has become conscious of his aunt as a woman, and one day he confides this to his aunt...