... oh wow... It's great and all that the feeling is mutual... But there's something very twisted about this relationship lol. Seems she's enjoying the 'bullying' a lot...
It reminds me of some other manga whose name I can't remember that I read here where the popular girl and the bullied girl were actually together despite the popular girl's clique bullying her. (Specifically in the story they handcuff her in the bathroom or something like that and the popular girl comes back for her later that night.) Both that and this seem way out there and arguably very abusive even if it is technically mutual.
A is in love with B and by her own borderline yandere logic bullies her.
B is in love with A and knows she bullies her, has come to terms with it, keeps the letters in a precious box.
It sounds really unhealthy, but they seem to have both very different mindsets from the average teenage girl.
It's an interesting dynamic between them.
"Why did the condemned queen leave letters of proof in a casket?"
Very interesting analogy.
At first glance, who would have guessed, because she's in love with the sender?