IENE-984 The only king's game with my sister's female friend and a guy is me alone

When I got home, my sister was having a girls' night out. My sister usually makes fun of me, but her friends are very interested in me. We started playing the king's game on a whim, and the commands gradually became more erotic, with the girls' orders heating up as well. Overwhelmed by the erotic power of girls who are interested in sex, the harem-like king's game plunged into dangerous territory! Wait a minute! Even I think that's too much with my sister!