I’m trying to find a historical yaoi manga about a slave(uke) that was being sold and wh...

I’m trying to find a historical yaoi manga about a slave(uke) that was being sold and while on the street a royal man (seme) saw him and impulsively bought him. The seme was I think supposed to be engaged to someone else but he’s conflicted with what he’s feeling for his slave. The uke likes him as well but he saw him and the person the seme’s supposed to be engaged with having a lovely time together and so he was hurt.

The uke is black haired, petite and dark skinned. The seme.. can’t remember much but he had a large build with black hair. Please help me find it I forgot the title