Couple of things that throw me off. I'm still thrown off by the "transported to another world" thing from the beginning. Why? What purpose does it serve? Is it just in order to make this a wish fulfillment series? The MC doesn't even remember her past life. Maybe it's connected to how she's having these...visions...? I have no idea, though.
Second, the flashback was kind of weird. The elder sister knows the violet-haired boy was the prince of Aubrey, the current fiancé of the MC... How? We see the flashback go from the boy meeting the MC to him bringing her inside from the rain. End. Nothing about the prince taking her to her parents. Nothing about the prince introducing himself to anyone. Clearly the MC didn't know who he was, so how did the older sister know that was the prince, the current fiancé of the MC? Let me be clear that yes, I am nitpicking. Yeah, not everything needs to be explained. It just feels incomplete without even one more panel to show the prince bringing her in and talking to some adults.
Just things that I was thinking about.