WAAA-579 Arai Rima turned her younger sister, who is plain, shy, and not interested in sex, into someone deeply immersed in drug-fueled intimacy and made her climax repeatedly, leaving her completely devoted to him

Rima-chan, a goth-style younger sister I met at her house. She’s a shut-in and very shy around people. I’ll turn this girl, who has no interest in sex, into a drug-fueled plaything! Her undeveloped slender body is transformed before long into a vulgar desire monster, climaxing again and again! A series of scenes involving a deceptive drink, drugged encounters, intense teasing, and reckless seduction, all while her sister is nearby. In the end, she becomes an extremely submissive plaything who gets carried away no matter what happens!