I love this.
The fact that there's no crazy isekai/reincarnated premise actually makes this stand out these days. Just your classic old haunting by a vengeful ghost.
Also the main character is a nice person, but (more so in recent chapters) not in a naive way. She's woke. Yay for moral...
I'm not sure about the other chapters, but I feel like this last one was ok. It kind of came out of nowhere, but nobody ever expects to die in an accident - there's no foreshadowing or pacing for it in real life. So I think it's acceptable.