In order to get hold of a book in which the weak point of God would be recorded, the principal of Dead Rock, Yakuto, Honey, Frei and Chako go to the labyrinth library Curse Velocity. Their path then crosses that of Kuga, one of the most powerful students of the academy. Yakuto and his friends do their best to keep him up but, without knowing it, they draw the attention of one of the members of the demonic quartet...