The stepsister born from my parents' remarriage is a bundle of curiosity about erotic things. Meanwhile, the sister is a super serious girl who only studies. This stepsister relentlessly questions her sister, 'Do you masturbate? Do you have a boyfriend?' and even starts touching her sister's erogenous zones. The sister can't help but feel it. And gradually, her body is developed... Furthermore, later on, she forcefully involves me in an incestuous orgy! The serious sister now comes with a face of ecstasy!
