12 Suicidal Children

Other name: 十二人の死にたい子どもたち , Twelve Children Who Want to Die , Juuninin no Shinitai Kodomotachi , Juuni Nin no Shinitai Kodomotachi , 12-nin no Shinitai Kodomo-tachi , 12 Suicidal Teens

Synopsis:
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.