Responses
Well it might also be because he relates to minjae in some way. I'm guessing that chapter of him saying "our secret" and making minjae sleep is a reference to him also being assaulted. But that's just a theory.
beta
??? the brothers are romantically involved w each other??
or what if the older one that is sickly is adopted as well and yeah ik hes sick thats why hes crossed off as the successor but what if hes also crossed off bc hes adopted? and thats why the black haired guy is the successor instead
sorry i just cant process that they might have taken bromance to a whole other level