Nanami, the unsociable younger sister I met at her house, is a recluse and shy. I'm going to make this girl, who has no interest in sex, addicted to drugs and turn her into a human toilet! Her undeveloped body transforms into a perverted girl who squirts in pleasure! I'm going to trick her into using birth control pills and have sex with her, secretly give her an aphrodisiac and have sex with her until she's covered in sweat and incontinent, have sex with her until she's full of belly punches and cums, and have sex with her while she's choked and has a squirting orgasm next to her older sister (girlfriend). With the power of the aphrodisiac, she's an ultra-masochistic human toilet that'll orgasm with pleasure no matter what you do to her!