Emma Rodman is a girl who strives to be a knight. She is from an interstellar nation called the Algrand Empire. She lives on the... more>> planet Hydra, ruled by Count Banfield. As a child, she saw a knight who was driving a mobile knight, a humanoid weapon. Seeing it she aspired to become a knight herself. However, in her first battle, she failed. Emma is given a "D rank" rating, making her a failure of a knight, and is shipped off to a frontier security force. <<less

A world where someone’s magic and affinities are determined by their Crest. In that world, everyone had high hopes for Alec, the 6th Prince of the Holy Luxia Empire, due to his large mana capacity.... more>>

However, after he receives the Dark Crest best suited for using Dark Magic at seven years old, their attitudes do a complete flip.
Users of Dark Magic all turn into demons sooner or later, so Alec having a Dark Crest best suited for using that comes to be called cursed and gets spurned by everyone.

Becoming closed off from people, he stays in the palace until he turns twenty, when a revolt sparks in the empire.
Left behind in the palace, he drinks poison before trying out his Dark Magic once, but....

Alec was able to use Dark Magic without turning into a demon.

As Alec’s consciousness gets swallowed by darkness, he regrets not being able to master Dark Magic, so he makes a wish────To redo everything.

This is a story of a man with a cursed Crest starting his life over again. <<less