Yaoi - university students, I think, about art students. They were roommates, and the seme was extremely talented (esp. according to the uke), but the uke basically took car of the other guy (who I believe owned the apartment).

Both were painters? It turned out the uke was pretty talented too?

I may be combining two - I just remember a painting of a landscape and confusion abounding due to drinking at one point

I may be wrong but it sounds pretty similar to Totsuzen, Doukyonin ni Marking Saremashita.

https://www.mangaupdates.com/series.html?id=145743