Hi, can someone explain to me why he get slap in chapter 1 when they doing se*

Because he throws up seeing semes asshole.
He wanted to fuck him, but unfortunately in the end the uke is being fucked.
In the start alpha, does not mind who catches or receives as long as they are together.

Ohhjj, ok. Thanks

i think ur explanation is wrong, the tanned guy is used to put it in and he used to sleep with women so he always wants to put it in, so when the white hair guy is sleeping hes trying to put his dick in his asshole but he got caught and he got punched. he didnt throw up. nearing the end of chapter 1 u can see also the white hair guy saying "u can come to the bedroom when u want to be embraced" means the white hair guy strictly only want to top.