Spoiler......
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Well actually it's kind of true. The real Raeliana is actually Beatrice. She switched her bodies and changed the future. She was in love with the ML and didn't believe it was fair how she would die. She saw her future and the future Raeliana would have and thought..... why not just switch bodies with my best friend who moved away? I know she wouldnt give any fucks. And bippity boppity boo, there's how everything is now. There may be some other stuff to go into details about, like who did it and stuff but that's basically confirming it and why she did it.

this is sooo complicated. but after reading the spoilers and some analysis and theories of other fans, now i can understand this story more and everything makes a lot of sense now!
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for others who are curious here’s a little spoiler (according to my understanding since it’s kinda confusing)
og rae’s soul -> bea’s body = beabitch
eunha’s soul (og bea’s soul) -> rae’s body
so it’s like in the og novel noah fell in love with bea right? and now noah fell in love with rae who’s soul is eunha/og bea. so others are saying that noah would fall in love with ‘her’ (as in her soul? cause it doesn’t matter who’s body she’s in)
+ according to them she was good at languages since eunha is og bea and she studied in a prestigious school before so there’s that?