START-098 [Uncensored Leaked] Nanase Aoi - The story of how he succumbed to the unconscious temptation of his girlfriend's busty sister, who is curious about sex, and ended up being NTR'd.

Nanase moves to Tokyo from her hometown of Okayama to attend university, but runs into housing trouble and ends up staying in the apartment where her older sister lives with her boyfriend. Now that she's away from her parents and curious about everything, Nanase ends up becoming interested in her sister's boyfriend, Yuta... Cute, busty, and no bra! A dreamlike story of a man getting cuckolded by his girlfriend's increasingly erotic younger sister!