I'm looking for dramas where the lead changes himself in order to get the girl. Like if he was rude or did a sketchy business but once meeting the female lead, he changes. some examples I've already seen are
One of the best, and cutest stories I've ever seen about a ML who becomes a better man for the FL is Dr. Gang (2006) about a gangster who's on the run for the police, goes undercover in a hospital as a doctor, there he falls in love with a female physician.
1. Orange Marmalade Main male lead stops needlessly hating vamps just for being vamps. 2. Memories of Alhambra Main male lead had a bigger temper and lesser regard for the welfare of others at the beginning.
Usually it's more the situation that the ML changes because he met the FL, not so he can woo her. Typically he thinks he's perfect or at least content with his life.
Because This Is My First Life - the ML has been emotionally dead for some time, other than his attachment to his cat. He only lets someone into his life because his mortgage payments are so high, and never intended his roommate to be a woman even if she did get along with the cat.
When one of the main leads falls in love with the manager of the hotel that he wanted to buy and then resell, after many many episodes full of hate, pain, stubbornness and thoughts of a businessman, he decides to put aside his plan (he had been entrusted with that work by a partner and for him his work was the only priority) - - - [The character is much deeper than this, so I encourage you a lot to see the drama if you can. The internal processes of this character are very deep and well developed]