When a colossal robot of unknown origin begins systematically dismantling the world's most advanced military machines, global superpowers scramble to identify who controls it. Intelligence agencies clash, governments issue threats, and the international order teeters on the edge of chaos. Hidden away in an isolated kingdom, three princesses go about their lives largely unaware of the brewing geopolitical storm. One of them harbors a secret that would explain everything: she's built a robot of her own, and not for the reasons anyone would expect. What starts as a personal project becomes entangled with the larger mystery consuming the world's attention. Comedy and action collide as the princesses navigate royal responsibilities, technological ingenuity, and the mounting pressure from outside forces determined to uncover the truth. Playful ecchi moments undercut the mounting tension, keeping the atmosphere light even as the stakes grow. This five-episode OVA balances mecha action with character-driven humor, offering something quirky that refuses to take itself too seriously.