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In a world where secrets can be both a shield and a sword, high school student Tsugumu Ichimonji, a renowned bodyguard, is tasked with protecting the enigmatic Himeru Kokoro, daughter of a wealthy magnate. When Tsugumu transfers to her school to keep her safe, he unwittingly uncovers a whirlwind of secrets surrounding Himeru. From her immunity to fire to her past life as a hero from another world, each revelation opens a door to new challenges and bizarre adventures. As Tsugumu navigates through a mix of genres—fantasy, sci-fi, spy action, and comedy—he finds himself in an ever-escalating battle to keep Himeru's numerous secrets under wraps, while also grappling with the implications these have on their lives and the world at large.
