Story
A turn of fate... by your own hand. Alicia Melfont vows to restore the former glory of her house after the Dark God's agent massacres her family. But when a mysterious book reveals that she's only a supporting character meant to die for the true protagonist of the story, Alicia decides she won't let some silly book determine her fate. (Source: Manta) Note: includes one extra chapter.
Synopsis via AniList (English).
