My Husband Oh Jakdoo - He is a gayageum maker genius but after his grandfather death, he choose to live in the mountain with fake name and almost no one knows who is he. Even his wife.
If you are also watching Thailand Lakorn, I suggest you to watch 'Khun Mae Suam Roy' - Her twins is a mistress of chaebol, but Her twins got shot and became paralyze for two years. And not long, her husband is dead and leave a will for her to live in his Palace. She acted as her twins and investigate who is the one who shot her sister. It'd be perfect drama for you :)