I'm Nobody's Shadow(2023)

Dangsinui Geurimjareul Geumandueosseul Ttae

Behind every great man is a great woman, but that is only half true when it comes to Lancaster's famed painter, Count Ryan Bryerton. In fact, his wife, Ennis, is the talented one, but submits her paintings under his name to give him the honor and status he desires. However, Ennis makes the shocking discovery that Ryan's been cheating on her with her best friend, and is almost sent to a mental institution by the traitorous pair! Once an accident sends her back to the past, Ennis is determined to expose Ryan as the talentless sham he is...

(Source: Tappytoon)