Rena Tanaka

Nagi is a female high school student in Yokosuka, Japan. She doesn't fit in with her classmates. She likes to fantasize and when she hears a sound she visualizes the sound to colors. Her eccentric habit soon leads her to have repeated daydreams of flying in the sky. She doesn't feel good about that.

A murder and a disappearance turn out to be linked to the death of the lead detective's late mother in this Japanese crime thriller.