HSODA-105 My older sister, a NEET with a zero score who never leaves her room, has huge breasts and a massive ass! She's training with masturbation in preparation for her encounter with a real penis she's yet to see. It turns out my sister has leveled up to a 120-point slutty body as a sex partner. - Ryo Ohhara - Osamu Osamu

My older sister graduated from a beauty school and got a job. However, she quit because she became depressed by the sexually harassing talk from her colleagues. She then became a recluse, growing into a woman with enormous breasts and a huge butt, and turning into what is commonly known as a "woman living in her childhood bedroom"! My sister, who had no experience with men and no immunity to them, and who felt disgusted by boys' dirty jokes even during her school days, was secretly live-streaming herself masturbating in her room!? And I saw it...