Same here, i feel the same
Spoilers
Went to the raws and a Korean spoiled it I edited it a bit to be more understandable but
They said.
“Oh, I looked up the original a little bit, but when the mom died, the body disappeared. At that time, the count found out that his wife was a fairy, and because of that, he looked for information about fairies
And the countess=the mother=Rose, is the fairy queen
Rose ran away during an experiment and went beyond time and space, so she time traveled and went hundreds of years into the future. She lost her memory and wandered in the forest and met Kiyaron (the count) . After awhile she gave birth to three children and became pregnant with Ricessia , (the fl) she realized that she, who should not be there, would have to go back to her original time zone hundreds of years ago because if she continued to stay in the current one, the world of the current time will be destroyed.
But just before she died, she tried to cross time and space, but she couldn't go back to her original time and went back to a few years before she birthed the three brothers. In that time zone, she gave birth to the female lead, named her, and sent her to a nursery school, and died alone...”
So she’s biologically their little sister but some time shit fucked everything up so she ended up being older than them
Ohh, now I understood, tysm for the spoiler + explanation...
i'm so confused about her connection to this family. surely there is something but i can't figure out how exactly she is related to them since she can't be the late countess given that she's alive, and it doesn't seem she's his real daughter either due to her age