it's based off a novel?
Dude spoil more don't just stop at this point like what will happen at the end ?
Let me guess more , they know each other like a childhood friends seme would be tool in family everyone wants to use him and he knew that so no one loved him uke might be the only one who showed him importance and later uke vanished probably out of blue now seme been searching for him that's why he accepted any person send by his bro in hope of meeting uke one day and he finally caught the real one that's why he suggested using each other uke has weakness his father and seme that's his family who is using him for inheritance shit .... that's all I can come up with
mc has amnesia
they know each other from middle/highschool then there's an accident hence the scar on his nape
and the ml still love him and that's also why he has been fucking twinks left and right