[Reducing Mosaic]DISM-018 "There's no way I could get excited watching AV," my sister said nonchalantly… and then she came into the bathroom while I was taking a shower, pretending to have made a mistake.

A younger brother who has no choice but to show his sister who wants to see AV with a reason. My older sister who is breathing rough while saying "I can't get excited" and my younger brother who gets excited by the appearance of such an older sister. An awkward air flows out of the room, but eventually my sister who can't stand it comes into the bathroom while her brother is taking a bath because he wants to see his cock. I approached...