The commencement of class is heralded by the ringing of the school bell, leaving no room for tardiness, especially on the first day of school. Tsugumi Harudori registers for the "NOT" program at the Death Weapon Meister Academy, where she'll master the art of handling weapons that can transform, just like herself. Numerous "NOT" (Normally Overcome Target) students aspire to enter the esteemed "EAT" (Especially Advantaged Talent) class. Negotiating her way through the chaos of the school, Tsugumi must overcome challenges in discovering a suitable partner and gaining self-assurance.
