Lyle_a's Favorite

Ok so I read this manhwa and I don’t even remember what it was about but it’s one part that been on my mind lately and I wanna go back and reread the story. Anyways in the story the couple was in a fake marriage or something I think and they had to consummate the marriage and they ended faking it to trick everybody and then they actually ended doing it for real… i literally know this not much but this has been replaying in my head for days now but if yall know what story I might be talking about please let me know