In an era where the gods have disappeared, Affinity Users have risen to become the dominant force shaping the world.
Various affinities clash, igniting sparks that influence the course of the future.
Affinity Users have formed different organizations, such as mercenary groups—or perhaps "jack-of-all-trades agencies" would be a more fitting term—where they take on all sorts of commissions.
One day, a mysterious girl named Mo Ying crosses paths with Kagumo, the Affinity User who saved her three years ago. Kagumo extends an invitation for her to join the mercenary group.
After Mo Ying joins, a series of challenges arise one after another. Together, they embark on a thrilling adventure, uncovering the stories of each member, and ultimately, they stumble upon a secret powerful enough to overturn the entire world…