SDMF-042 — My Junior High School Dropout Sister Has Been Living As A Shut-In In A Dirty Room For The Past Seven Years, And She Had Her First Sexual Experience With Me While I Was Sleeping, And I Know That She Continues To Satisfy Her Sexual Needs By Sneaking Into My Bed (Without Contraception) Ever Since.

I've just returned to my hometown after seven years, and I have a younger sister who is five years younger than me. I know that she has been a recluse since middle school, never going on to high school, and living a NEET life, never getting a boyfriend, and devoting herself to games and anime. I wonder what her desire to have someone affirm her existence led her to resort to reverse night r**, and I wonder what I should do as her older brother...