This is basically how an otome isekai protagonist regain memories of her past life. It's just instead of the typical " hit their head" , " villainess condemnation event" or " wakes up and remember" , we get this rather odd situation. Will her being an adopted kid have any actual impact on the plot? Or will it just be swept under the rug and forgotten. Will this weird start have any impact on the plot? At this point, I have no idea but my instincts say no.