Could you guys please help me find a film, please. I dont have the name nor the year in which it was published. Its a Korean film. The film starts with the protagonist (female around her late 20s or 30s) talking about her exes and there are some scenes of the stories she is telling. Then she says she has a boyfriend now. In the next scene they are talking about living together and they are choosing furniture. She thinks he is cheating on her and most of the film is about her trying to discover the infidelity. The plotiwst is that the boyfriend is a serial killer that kills the man who mistreated his mom, she was a prositute. and there is an animation of the story of the mother. the animation i think i was in back, white and red. He tells her the story in a kin of bunker in where he kidnapped the protagonist. And the movie ends with the couple together.
Please tell me if im mixing films or if the movie exixst because i've been trying to find the movie literally for years. thanks in advance!!!