Within the realm of magic, a set of highly dangerous and irreversible techniques known as spellblades exists. These potent spells, as well as the wielders who employ them, remain enigmatic and mysterious to the general populace, with their absolute lethality being the only widely known aspect.
Each year, the arrival of cherry blossoms heralds a fresh batch of students entering the esteemed magic school, Kimberly. Welcoming the newcomers with a grand parade accompanied by magical creatures, the spectacle evokes awe and astonishment. Among the new students is the enigmatic Oliver Horn, whose disinterest transforms into fascination when he encounters an intriguing figure—a girl donning peculiar attire and wielding a Japanese sword.
As the entrance ceremony concludes, Oliver soon realizes that appearances can be deceiving within the walls of Kimberly. Labyrinths, menacing creatures, and other perils emerge, threatening the safety of the student body. The series delves into the interconnected destinies of two warriors as they unveil the sinister truths hidden within the academy's confines.