Due to his habit of slacking off, college student Satoshi's exam scores are the worst, and his promotion is in jeopardy. Concerned about such a Satoshi, his mother asked her younger sister Chieri, who lives in Tokyo, to keep an eye on him. Confused by the sudden cohabitation with his aunt, Satoshi finds himself living like he's in prison, barely able to masturbate... and to make matters worse, he accidentally catches a glimpse of Chieri's mature naked body! At an age when Satoshi is horny as hell, he can't hold back his pent-up sexual desires any longer...
