SDMF-042 | I know that my younger sister, a junior high school graduate who has been living as a shut-in in a dirty room for 7 years, had her first experience with me while I was asleep, and has since then continued to satisfy her sexual desires by having sex with me at night (without contraceptives). . Anzu Kuzuha

I came back to my parents' house for the first time in 7 years, and I have a younger sister who is 5 years older than me. I know that my younger sister became a shut-in after middle school, didn't go on to college, lived as a NEET, never had a boyfriend, and was absorbed in games and anime. I wonder if her desire for her existence to be affirmed somewhere led to Gyakuya, and what should I do as her older brother?