A group of boys and girls, twelve in total, gather at an abandoned hospital to die for various different reasons. There, they find the body of a dead boy. The group of twelve attempt to find the person who killed the boy. During their search, the reasons why they want to die are revealed.
| Actor | Role |
|---|---|
 Mahiro TakasugiSatoshi | Satoshi |
 Yūto FuchinoKenichi | Kenichi |
 Kotone FurukawaMitsue | Mitsue |
 Kanna HashimotoRyoko | Ryoko |
 MackenyuShinjirou | Shinjirou |
 Yuina KuroshimaMeiko | Meiko |
 Hana SugisakiAnri | Anri |
 Riku HagiwaraTakahiro | Takahiro |
 Takumi KitamuraNobuo | Nobuo |
 Ryota BandoSeigo | Seigo |
 Ai YoshikawaMai | Mai |
 Aisa TakeuchiYuki | Yuki |
| WWariko AkikaNot listed | Not listed |
 TomanNot listed | Not listed |