The illegitimate son of an unknown father became the sole heir of the Black family. In this unusual timeline, the Dark Lord died but fell in love with a woman and married and had children before his death. It seems that because of this, the Death Eaters' vitality was preserved. Our protagonist also embarked on a journey to find his father after the death of his mother.
The male protagonist is the son of the Dark Lord, and the cp has not yet been determined. "It is expected to be a professor or Draco, the author prefers a professor." (?>?