Unknown X's Manga

Helga Yttri, a half blood who inherited the blood of a lowly maid. A bastard child who was swapped by the Duke's maid ,She's half aristocrat .One day, Helga finds out that she is the illegitimate child of the duke who was replaced the maid. She tried and tried to be real, but in vain. And the real daughter of the duke is back. Helga is abandoned. He decides to throw it away before receiving it. 'Then lose me, mother.' They will realize the value of the things Helga has built up.