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Large Breasts Features a character with larger-than-average breasts.Female Harem Main cast features the protagonist plus several female characters who are romantically interested in them.Incest Features sexual or romantic relations between characters who are related by blood.Boobjob Features the stimulation of male genitalia by breasts.Fellatio Blowjob; features oral sex performed on male genitalia.Shabura Rental: Ecchi na Onee-san to no Eroero Rental Obenkyou THE ANIMATION
しゃぶらレンタル ~エッチなおねえさんとのエロエロレンタルお勉強~ THE ANIMATION
Suuichi's plans for a quiet summer of study are abruptly derailed when the private lodge he booked is destroyed by a meteorite strike. With his original accommodation gone, he accepts his sister Nanami's offer to stay with her in her dormitory over the break.
His attempt at a normal bath with his sister takes an unexpected turn when he is discovered by three other women living in the dorm. They strike a peculiar deal with Suuichi: in exchange for him addressing each of them as "nee-chan," they will each take it upon themselves to teach him a series of intimate and unconventional lessons.