It's about the fl married to the most handsome duke/marquis/count? In the kingdom. She meets the ml and was trying to help her and fell for her. So the ml told his friend the princess from another kingdom who likes handsome men to come to his kingdom and that there's this handsome duke/marquis/count. The handsome duke/marquis/count has blonde hair and blue eyes(I know not very helpful, but that's all i remember)
At first i thought this was just a regular human smart, sly conman and regular hot daddy's..... Damn the author is the real conman who told u to stack them plot twist so high