Springtime at Kimberly Magic Academy brings a new batch of first-year students. Among this year’s batch is a one Oliver Horn, a boy with a mission burning in his chest. His objective is to exact vengeance on the members of Kimberly’s faculty that brutally murdered his mother, however, when he meets a samurai girl from the distant nation of Yamatsu, Oliver is trapped between his mission and his curiosity with the samurai girl, Nanao Hibiya. Alongside her, Oliver meets several other students that he becomes fast friends with, however, will these friendships prove detrimental to Oliver’s vendetta? More importantly, as introduced to him and the rest of the first-years during the entrance ceremony, Kimberly Academy has never once seen a school year without a single student death. Can Oliver and his friends survive these seven years of hell?