[Koubai Nadeshiko (Akausu Ko)] Little Sister Time Leap Dependence

A college freshman returns home expecting his usual routine, only to find his younger sister transformed into a desperate, insatiable nympho. Fueled by past aphrodisiacs that lingered in her system, she traps him at the door with an ultimatum—either she graduates with him or she makes him hers right now. Sweaty, flushed, and crying out "Oniichan, please make me yours," her clingy affection spirals into a night where her tight little body is completely at his mercy, milking every drop until he's utterly spent.