Responses
I would assume it's her previous life in a different universe. Not so much an alternate universe, but she lived in the "modern world" in her previous life, died, and got reborn as (nenemia or whatever her name is) with no memories of her previous life. So he just unlocked those past life memories, and locked up some of her previous memories to give her a will to live. Only allowing her to remember what he showed her about the future and stuff.
This was amazing, honestly one of my favorites (that is completed)
There is one small plothole, they say her previous self was her past live, but that doesn't make any sense. Shouldn't it be alternative universe? Because in her 'past life' there wasn't any magic and instead was medical advancement, unlike her "current life" where they don't even know the emperor has lung cancer except for her because no modern medicine or surgeries.
But whatever, I guess it didn't matter. It was good and happy about the ending. Wish there was a bonus of the new emperor and the original FL getting together, and a bonus of the second prince living his life with his mother.