WANZ-373 Hey, little brother! Be my big sister's condom practice dummy Asakura Yu

My sister, who just debuted in college, got a boyfriend! 'Condoms are an absolute must,' she said, having been raised with that education. She started practicing putting on condoms using me, her little brother! Her awkward way of doing it made me involuntarily hard! Since I'm helping you practice, you should service me too♪ So we ended up doing handjobs, blowjobs, and even sex! The condom slipped off midway, leading to incestuous sex! ...But since it feels good, is it okay if we continue with bareback sex, sister♪