
SPOILERRRRRRR....... (Story isn't completed yet)
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It's been a longgg time since I read the story and I don't remember names anymore but. TLDR! There is a happy ending(sort of...for now). Turns out magic exists but magicians died out centuries ago so the existence is unknown. FL travels across parallel universes to relive the same fate even after death due to this magic.
The crow is actually the ML (I don't remember if the manga revealed that yet. He has an equally tragic backstory and is actually a magician who against his will is cursed with immortality)
Anyway the crow magician ML guy literally travels across the multiverse trying to save her. Many many times he fails to and gets there too late ( (/TДT)/ ) but in one of the latest chapters in the novel, FL finally gives up on her fiance, allows herself to die for her sister. In her final breath, ML finally travels across the universe to find her in the nick of time and saves her. They finally get to be together.
The latest most chapters are a weird spin off epilogue of ML past life with a previous lover and the updates are very slow. There's probably supposed to be a connection but I'm not invested. I don't really consider it a happy ending because ML is immortal and FL will age and it took traveling hundreds of universes to find and save her... But take it as you will. Happy ending!

Yeah there’s like an extra or chapter where it’s from his pov and he’s like watching his body move against his will and doesn’t want to actually act like a piece of trash to the mc. However, he can only watch as his body love against his will, which is kind of messed up lol
I only read the novel spoilers tho idk lol
At this point I'd love some spoilers on how this ends please