I’m looking desperately for a book, I was just starting to read it when I lost it, so I just remember a scene from the beginning of the book.
The H and h are neighbors.
The H is a gamer/nerd that lives in an apartment and has a pretty solitary life. The h is a serial killer that just killed a man in her apartment. So she rolls up the body in a carpet and carries it through the hallway. She’s very small so she’s having a hard time, then the H opens his door and salutes her and offers her help, but she’s nervous ’cause the blood is starting to sip to the floor.