Yuichi died. A boy who was so kind. jumping off a railway bridge? That just couldn’t be true. “I’m sorry. I couldn’t do anything. Even though I knew Yuichi was going to die.” “Huh?” “Because I can see things.” Chisuzu, a high school classmate, says this, revealing that she “knew” how Yuichi would die. Left behind, Yuichi’s best friend, Mitsufumi, begins to unravel the mystery of his friend’s death alongside this mysterious girl. And the two of them know of another “ending.” That Chisuzu will die in a year’s time.