A young man named Ryo stays at his aunt's house while attending college in Tokyo. He struggles with being too close to his longtime crush and aunt, Yumi. Despite knowing she's off limits, he can't help but fantasize about her. One day, unable to control his desires any longer, he secretly puts on a pair of panties and starts masturbating. Unfortunately, his aunt walks in on him just as things are getting hot and heavy... *Delivery methods may vary depending on the recording contents.*