 If you liked
Watashi wa Akuyaku Reijou nanka ja Nai!!: Yamitsukai dakara tte Kanarazushimo Akuyaku dato Omouna yo
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 ...then you might like
Moto Ansatsusha, Tensei shita Kizoku no Reijou ni Narimashita.
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This 2 story have the same ideea of a noble child who grow up in a family that doesn't like them and when they grow up the became something special for the princes.In that where is the mother who is too scared to talk to a child and obviously the sister, but the father looks at all this and just ignores it.