Pieta, a normal girl, leads a normal, uneventful life in a world of constant black rain. As the rain pours down, like it always does, she takes her usual route to school and has a pleasant conversation with her friend Danae. This is what every day is like for Pieta, and she takes a sort of everyday satisfaction from her totally normal life. But then her typical, pleasant conversation with Danae... doesn't happen. And why can't she remember yesterday?

Reads from right to left. "First published in Japan in 2020 by Kadokawa Corporation, Tokyo"--Colophon.