!!!! forgot to mention a crucial detail im pretty sure the 2 brothers are dukes or some other kind of nobility
Probably shadows crown
it does look similar but its not that one <3 thank you tho
Is it this one?
https://www.mangago.zone/read-manga/solar_eclipse/
YES OH MY GOD THANK YOU SO MUCH SJUSHE
been looking for it for years i will try to remember as much as i can but it was a while ago so bare with me
plot: set in the victorian era (?) the mc (black hair and purple eyes) often solves problem for people in exchange for cash. so one day a client wants him to pretend to live as his missing brother who happens to look exactly like the mc. that missing brother was the lover of the royal prince (blonde hair). basically mc lives in the royal palace and pretends to be his clients brother and the princes lover.
oh and at some point the guy who hired the mc fucked him. (despite him looking like a carbon copy of his brother yikes) but yeah thats all i can remember :( if this sounds familiar in any way please tell me the title. i started reading it in late 2021 and im pretty sure the story was still ongoing.