I Became the Master of a Harem in a Dark Novel

I woke up in the body of Ailexia, a supporting character with a harem, in a 19+ dark novel written by a friend. And it had to be in a bizarre situation where I was trampling on a man. The problem here is… The man being trampled on is the original male protagonist who kills Ailexia. I tried my best to avoid getting entangled with the male protagonist. – ‘Intertwine your bodies.’ I fainted at the sound of a strange voice, and when I woke up, I was lying in bed with the male protagonist. – ‘…You’ve had your fun, why don’t you go back?’ …It seems like something big has happened. *** I tried running away, pretending to be Ailexia, and diligently searched for a way to return. Perhaps bec...