Responses
the seme himself acknowledge it was rape (chap 3, page 11)
the hosts send their coworkers who "need to be punished" to the brothel to be raped and the prostitutes agreed to rape them (they had sex with them knowing the guys were straight and didn't want to fuck/be fucked by men)

2nd story is so delicious ლ(´ڡ`ლ)