In her dying moments, Dizel recalled memories of a past life.

Among her memories of living as an ordinary girl in another world, there was a story featuring a girl remarkably similar to herself.

In that tale, Dizel was a character whose body was possessed by a demon, and as the villainess, she tormented her younger sister, Towa, the heroine.

Remembering these memories, Dizel embarks on a journey alongside the demon, not only to torment Towa but also to fulfill the demon's wish by plunging the world into misery.

This is the story of a girl who loved a demon, and who now lives for misfortune and vengeance.

*Also serialized on Kakuyomu, AlphaPolis, EveryStar, pixiv, and NovelUp.