A visual novel written by Looseboy, scenario writer for G-Senjou no Maou and Sharin no Kuni and art done by Alpha.

The world that Eiji knew changed completely one calm spring day. The school which he attended was attacked by evil enemies which cannot be seen. The students all took up arms to protect the things which they treasured the most. It was a battle which would not end until there was only one left standing.

[Edited from Hau~ Omochikaeri!]