Other names: 12-nin no Shinitai Kodomo-tachi ; 十二人の死にたい子どもたち ; 12 Suicidal Teens ; 12인의 죽고 싶은 아이들 ; Двенадцать детей, которые хотят умереть ; 十二个想死的少年 ; 十二個想死的少年
The story is a locked-room mystery where 12 kids go into an abandoned hospital to give up on life. In the room where they meet, a boy is already lying dead, and no one knows who he is.