Kuroi Ame ni Utarete

A young man named Shuji is caught in a mysterious black rain that causes people to lose their memories. As he tries to understand what is happening, he meets a girl named Aoi who also remembers the rain. Together, they search for answers while dealing with the effects of the rain and the growing number of people affected. The story explores their journey as they uncover the truth behind the phenomenon and its impact on their lives.