NTRH-007 The Beautiful Big-Titted Gravure Idol I Use as Fap Material Every Day Turns Out to Be My Girlfriend's Sister!? With Real-Life Jerk-Off Material Right in Front of Me, My Cock Goes Wild! I Know I Shouldn't, But I Fuck Her to Multiple Orgasms, Turning Her into a Disqualified Big Sister! Mayumi Hazuki

The male protagonist uses photos of a busty gravure idol as his daily masturbation material, only to discover that this idol is actually his girlfriend's older sister! With his living jerk-off fantasy right in front of him, his cock instantly goes berserk. Despite knowing he shouldn't, he can't hold back, fucking the sister to multiple orgasms, ultimately turning her into a depraved, slutty big sis. The film is packed with taboo NTR elements, showcasing intense sex scenes driven by uncontrollable lust.