By chance, I stumbled upon my sisters' AV viewing party. As an older brother, I think I should be careful, but considering my recent relationship with my younger sister, I decided to leave it alone... However...I can't help but wonder what happens on the other side of the wall! ! When I try to leave the house to kill some time outside, my sister's friend spots me and stops me! ! Then, when she suddenly asks me to go with her and takes me to the bathroom, she starts playing with my crotch, saying,"I got horny while watching AV...right? It's okay, right?'' !What's more, she took off my pants, checked my penis, and started intertwining her tongue with me...! ?