[Yami] YuriYou Inpio

A big sister wakes up shrunk to the size of an elementary schooler, and the first worried knock at her door is her little brother Yousuke—still aching for the intimacy they already shared once before. Rather than turn him away, she coaxes him into bed, letting him grip her small hips and pound her from behind until he floods her womb with far more than he usually releases. Wrapped in his trembling embrace afterward as he whispers that he loves her, she quietly wonders what she'll do if she never changes back at all.