My beautiful aunt comes to stay at my apartment...

Satoshi is a university student who is suffering from poor exam scores due to his daily habit of slacking off, and is in danger of being promoted. So worried about Satoshi, her mother decides to have her younger sister Chieri, who lives in Tokyo, act as a supervisor. Satoshi is confused by the fact that he lives with his aunt, which began by chance. It's like a prison life and I can't masturbate properly...and by chance, I happened to see Chieri's mature naked body! Satoshi, who is at the age where he wants to have sex, is no longer able to control his lingering sexual desire...