In the spring of a new semester, a "ranking" is sent to Class 2-D. It clearly shows the rankings of all the students and the homeroom teacher. The one who ranks 1st is Himeyama Tsubaki, a kind and popular honor student recognized by everyone. But one day, without any warning, she commits suicide. A few days later, everyone in the class receives a suicide note from Himeyama, and from that day on, the class begins to fall apart.

Hokuto Yoshino
as Shuya Ikenaga

Ryubi Miyase
as Seiichi Chikage

Sara Shida
as Kurumi Hatsukaichi

Minato Matsui
as Shuya Ikenaga

Akari Takaishi
as Rinna Mikado

Shugo Oshinari
as Makato Kaihara

Kokoro Aoshima
as Ami Kinukake

Keishi Arai
as Masaaki Oki

Tatsumi Asa
as Wataru Tsushima

Raiku
as Yuki Yamane