Break it down for an idiot like me pls
1. ML as in MC? Did you mean MC? He likes having sex with both? Without pheremones causing it? So how come he only ended up with husband ML?
2. How did the brother in law end up with the MC’s original body? I don’t mind all spoilers please. I saw the other spoiler and it was so long my eyes went cross eyed
3. How did brother in law fall for MC’s original body (oh wait as I’m typing I just remembered the heeseo guy is in MC’s old body, and the brother in law likes heeseo)
I’ll answer your questions:
yes mc is the slut, he enjoys having sex with both and only becomes exclusive with his husband at almost the later end of the story. mc and brother in law have sex a lot, almost as much as him and his husband.
mc falls for his husband bc he is the one who figures out he is in the wrong body and husband helps him find what happened to his og body and what became of the og heeseo. so like he falls in love because they know each other the best and because it can’t compare to the brother in law’s superficial love who only likes him for his looks.
as for the brother in law, after he loses to his brother he goes to a beach vacationing spot where the og heeseo is in mcs body is hiding and living his own life, and coincidentally they meet at his workplace. brother in law is captivated by og heeseo and og heeseo remembers him and remembers that he used to like how kind he was when he was in his old body. they don’t explicitly get together but it’s pretty implied that they will

I just read the ending and MC ends up with husband (he stays in his current body) and brother-in-law ends up with original body owner who is now inside MCs body. So happy ending! Also they have twins. I have to say, ML is quite the slut he likes having sex with husband and brother-in-law and wants both at the same time I love him