IENF-225 Surrounded by girls, I'm the only man !? King game !! I noticed that my sister's classmates made me naked ... 4

When I got home, my sister had a girls-only gathering. My sister usually makes fun of me, but my friends are curious about me. The king game started with glue and gradually became naughty orders, and the girls' orders also heated up. Overwhelmed by the erotic power of a girl who is interested in sex, the king game in a harem state rushes into a dangerous area! Hey! It's really bad with my sister!