Comment by UwU on Death Is The Only Ending For The Villainess - Chapter 159

Does anyone know the title of a manhwa where the mc(female) kept hearing strange noises above her apartment, similarly to dragging a body. Then one day, she accidentally enters the apartment above her and discovers a dead body. She escapes the apartment through a window and ended up in the hospital, where she tells her best friend that the person carried her is the killer. The mc investigates and helps certain people, and even involves police. But the killer's targets have all some sort of physical similarities and somehow ended up falling inlove with mc's best friend, who had also a physical similarity to the killer's victims. And, the police mc involved is actually a traitor who's helping the killer monitor the mc. Then I heard a spoiler that the mc and the killer are actually siblings.... something like that

Sorry, english is not my first language