College student Suzu is the home tutor of her childhood friend, female student Urara. The two are like real sisters. One day, Suzu's boyfriend Tetsugaku sets his eyes on Urara. Tetsugaku is a delinquent and has been deceiving pure Suzu into dating him. To borrow money from his brother who has sexual fetishes, he plots to offer Urara up… Eventually, Suzu also falls into their hands as a plaything, and the curtain rises on the hell of debauchery…
