I can only think of this
http://www.mangago.zone/read-manga/docchi_ni_suru/
http://www.mangago.zone/read-manga/futari_no_musuko_ni_nerawarete_imasu/
http://www.mangago.zone/read-manga/kedamono_hatsujouki/
Theyre a good manga..
Well if its not this manga heres more
http://www.mangago.zone/tag/Threesome/?page=1
uhmmm. do have another rec.? the uke has like a silver/white hair and one of the brothers has a mole on his chin and the color of the semes hair are brown and black
I feel like i've read that manga you were talking abt. I'll try to look for it
pls help me find this yaoi manga where there are 2 seme and a femine uke. i think the semes are brotheres? idk and they are kinda like childhood friends with the uke. and then the uke let them have him. (f*ck him)