Quite liking this one so far. It seems that the original MC just didn't quite understand that she was loved, but interpreted it all wrong and felt too guilty about her mother's death.
I wish that the MC hadn't 'possessed' the body, but was always that girl just remembering her past life memories - I've always gotten conflicting feelings about "reincarnating" people essentially stealing another's body; the original wanted to kill herself in a way so that everyone would remember her... and as it is now, no one even realises she passed, and everyone is liking the 'new' her more - it's just a very cruel twist that probably won't even be acknowledged in the story.
I think I harp on this on every possession story I read, as I always have these mixed feeling about the troupe.