A creepy, headless ghost resembling the legendary knight, the Dullahan, starts attacking students at Hazakura Academy. Apparently, the ghost is looking for its head. Kiyoshiro, for some reason, gets caught up in the middle of this chaos…
In the gradient space with no boundaries
"Come"
Im ansteigenden,
grenzenlosen Raum … „Komm.“
sakaime nai gradation no hazama de "oide"
Es un espacio degradado sin límites
"Ven"
Quelque part entre deux mondes
Elle t’invite à franchir le pas
No espaço gradativo e sem 
fronteiras ela me chama
В градиентном пространстве
нет границ, и меня зовут.