I'm searching for this manga for AGES PLEASE

So I'll try to explain what it's about but I can't remember much, I know that uke and seme went abroad like years later and got married, but little brother( I think) from seme (it's like last two chapters about that little brother) he has relationship with this other guy idk if it's just sexual or not and he calls his older brother to ask for advice for something, that's all I can remember if anyone knows please help I'm searching for it for so long~