Shiiba-san no Ura no Kao. with Imouto Lip

<i>Shiiba-san no Ura no Kao.</i><br> He's always been the quiet kid at school. Never trying to make a fuss, he's barely noticed at all. So why is the prettiest girl in school throwing herself at him... what could the reason be?<br> <br> <i>Imouto Lip</i><br> After returning home he found his younger sister watching porn inside his room, now she wants to try it...