They do and imo the story isn't a good one
https://www.mangago.me/read-manga/rabbit_hole_sojogeum/
Is the ml also a slut like his brother?
Not exactly. His little bro is sadistic. Really wild.
oof there really is one Σ( ￣□￣||) okay I'll be the judge! Thank you~~
Ohh but he has past partners?
Im so curious about the married brother abroad, only because I just skimmed through. I wonder if they have their separate story?