I don't really remember the story but there is one thing i remember. Every time one of them (uke or seme) give money to the other side ( it's a about 100 yen ) and the last chapter , we can see them 10 years later , together and they still give money if they want to do it. (I'm not English so sorry if you can't understand)
Chapter 5 and 6 of this? https://www.mangago.me/read-manga/sekai_wa_kimi_de_mawatteru/
It was a manhwa about an asian uke with brown hair who restored painting in Italy and a caucasian seme with blonde hair. The uke was at one point of the story hired by the seme to work on his aunt painting. Since I lost my reading list , I can’t find it so please help.
Ah and they met in a carnaval themed party in Venise
https://www.mangago.me/read-manga/oil_in_canvas_terebinoona_x_cabelita/
Omg thank you !!