@justanoyster way late... but it was revealed waaaay early on that he is her boyfriend, the girl that killed the MC is now pretending to be her... What is really strange is that they both seem to know who the other person is, but the MC isnt going near him for some reason. its really hard to tell since the author just seems to jump over entire sections which apparently include this crucial information. its really a rather large hack job of turning the novel into a manhua...