My older sister, a 0-point NEET, never leaves her room. After years of seclusion, she's developed enormous breasts and a huge butt! She trains through masturbation, preparing to compete with real penises she's never seen before. My sister, as a sex partner, has already achieved a 120-point lewd body. Fujisawa Reo OFES-004

●My younger sister has been living a reclusive life since high school. I went to university in Tokyo, and several years later, I returned to my parents' house for the first time. My sister said she was still as pampered as ever, a recluse. Curious about the sounds coming from her room, I peeked inside and found my sister, now with enormous breasts and a huge butt, masturbating! Seeing my sister become a chubby, introverted NEET with a high sex drive, masturbating every day, I was incredibly excited! My sister invited me to have sex with her because I was rock hard! 100 out of 120! My strong, slutty sister and I had sex all over the house! In the bathroom, in the living room, hiding from Mom! Swimsuit and uniform cosplay! Even ejaculation inside! I could do whatever I wanted with her voluptuous, slutty body!