After an injury costs him his leg and his life as an adventurer, Belgrieve takes in an abandoned infant he finds in the woods near his village of Torrnera and names her Angeline. He trains her from childhood, and once she leaves for the city of Orphen she climbs to S-rank in under five years, known there as the Black-Haired Valkyrie. Fame and fortune settle around her easily; what she actually wants is time with the father who raised her. This light novel is the source material for the manga adaptation.