Bokutachi no Ikita Riyuu
Our Reason for Living·僕たちの生きた理由
Akira intended to tell Himeno, the girl he liked, how he felt on the day of their elementary school graduation. However, when he arrived at the classroom, he saw Himeno in an unexpected state. Soon after, Akira and his classmates found themselves trapped in the school with no way out. The children are unsure who is behind the situation or their motives. As strange forces surround them, the 11 students face a terrifying and uncertain fate. The story follows their struggle as they confront this mysterious and dangerous scenario.