Takeru, a high school student working as a bike courier, encounters a strange phenomenon while on a delivery run. He discovers a girl named Hikari emerging from a cocoon of light in the forest.
Hikari is seemingly unaware of the world and initially appears vulnerable. However, their meeting is interrupted by a sudden monster attack.
In the face of danger, both Takeru and Hikari exhibit hidden powers, suggesting that they are more than they initially seem. The story follows their journey as they try to understand their newfound abilities and the connection between them.
The anime focuses on exploring the mysteries surrounding Hikari's origin, the nature of their powers, and the threats they face in this strange world.