first thought is Royal Servant but I don’t think that’s it haha
Nineteen Over! I rushed to find this fr just to tell u it
This? https://www.mangago.zone/read-manga/spinel_baekji/ The uke has blonde hair though, but there is a pendant stolen by the seme
Goshh this is the one I'm looking for ╥﹏╥. Thankss y'all!!!
the Lavender Blooming Garden short story
Its called Nineteen Over though?
Nineteen Over is an anthology of short stories, which Lavander Blooming Garden is part of. There are a whole bunch more but they were uplaoded on here individually fsr.
https://www.mangaupdates.com/series/3fkuja0/mr-blue-bl-short-stories-nineteen-over
I remember that the uke has a white hair and ml has a black hair with violet eyes. It started off to the part where the uke (is doing his job) and it is to return the brooch (not sure but kinda like that) it's something important for the ml to completely ascend the title of duke. While the uke is doing his job he suddenly stop to look at the ml's portrait but then the ml suddenly appear behind him while pointing the gun to the ukes waist and then they have sex. I'm not sure but if I'm not wrong the uke used to be a personal servant of the ml when he was young. They became quite close but uke is just there to do his job so their relationship as a servant and master ended too.