SONE-183 I was aroused by the bold seduction of my girlfriend's younger sister (a female idol),

Miyu is a popular idol, and to me, she is also my sister. And it seems that she has a serious crush on me. However, no matter how genius and cute she is, I can't betray my precious girlfriend. That's what I thought... "You can use me, an idol, as your masturbator, right?" Miyu took off her clothes and seduced me, and my reason collapsed. When I realized it, we were passionately entangled in tongues. Everyone's idol is climaxing with my dick... I can't get out of the swamp of cheating sex with a celebrity.