[Reducing Mosaic]NACT-075 That gloomy sister of mine is really into my dick? Hanamori Natsuo

Ever since she was young, my sister Natsubo has been gloomy and introverted. She doesn't make friends or get a part-time job, and she's almost always holed up in her room. One day, feeling frustrated with her, I wondered what she was doing in there, so I peeked through the door crack. What caught my eye was the sight of my sister drawing a picture using her own naked body as a reference. I had thought she was plain, but I found myself captivated by her surprisingly sexy body and ended up jerking off right then and there. Later, while I was sleeping, something felt good on my lower half… When I opened my eyes, my sister was sucking my dick! Even after I came, she was still muttering something, making me feel gross. Then she went and got into the bath! My sister woke up to her perverted curiosity, and I reached my limit...