GoSpark

they are wearing traditional korean outfit and they hold high positions. the younger one is jealous of his older brother who grew into a manly man while he with ling orange hair and fair skin and lean features is just a pretty boy who kept failing his exams. so one day, he schemed to drug him and it backfired on him. he stupidly locked the house gates and his servant bailed out on him bc he cant bear to betray the older young master bc hes so kind. so they did the do until the father came back the next day and they almost get caught.

I only remember this scene..
I think its a royalty themed manhwa where they are husband and wife already? But FL wants to escape

Its fully colored, the ML lured FL to a bedroom and they did the do, only for FL to find out that the man she was supposed to escape with was dying of bloodloss in a closet(?)/other room(?) And who happened to watch her do the do until he died.

I remember that the man was supposed to clear the way for her and they shared notes that they were to meet somewhere at this time. But FL waited and came across ML in the dark of night.

so yeah, ML shows FL the sorry sight of the 2nd ML and she weeps(bc i think she rejected him but he still offered to help her get out).

I think he was a son of someone important... One of 5? I remember he got siblings... I think he got orange hair? He was very familial and very loved.