SONE-732 _The younger sister likes to show off her underwear Shirakami Sakka

I'm a young man in my 30s, but I'm still very passionate about games, so I still don't have a girlfriend. That's why sometimes when I'm so hungry, I hide in the circus room to play video games. One day, I was engrossed in filming birds and turned the speakers up louder, so Shirakami accidentally heard the female lead in the movie moan. Shirakami is my younger sister, she is a beautiful and very cute schoolgirl. Maybe because she is in her teens, Shirakami is very curious about it. Shirakami knew that I had been to the circus so she teased me a lot. Not only that, she was also so naughty that she cleverly lifted up her skirt and showed off her underwear in front of my eyes. This really makes me want to explode, but I still have to try to control myself, but if this situation continues, I don't know if I can keep the remaining bit of reason, guys.