With her husband working away from home, Yurine has nothing to do with her boredom and sexual desires, and lately there's something that's been bothering her... It's the presence of Azuma, a university student who recently moved in. She can hear him watching adult videos and masturbating every night through the wall, and he's doing it an abnormal number of times for a healthy young man... Then one day, Yurine tries to manipulate Azuma by starting to masturbate herself. Azuma falls for her provocative moans and is lured into her room by Yurine's seduction...