Toumayhem

Yuki Kourei enrolls into Shigo Private High School, between the mountains of Hokkaido, to start life anew far from his hyper-protective mother.

His plan goes awry when he discovers the school's rigid hierarchies, in which the younger students must follow all of their upperclassmen's orders; too nervous to join them, he's completely cut off from the others and branded as Ghost.

Akito Ikeda, a fellow Ghost, persuades him to join the Spectral Brigade: a group of first-years who want to overthrow the current system. But nightmares and visions of someone dying haunt Yuki, and when a snowstorm cuts him and his schoolmates off from the outside world, these visions come true.