A princess fighter in a school full of weapon-wielding duelists, and the show treats every match like it actually matters. Your sister shows up to teach you the game everyone else already knows, which means you're learning strategy and trash talk at the same time. The comedy lands because it's not trying to be funny, it's just what happens when arrogant fighters collide with someone who has nothing to prove.
Doris Ruridou arrives at Teito Academy carrying a secret: she's a Panzer, one of a rare breed of warriors born with supernatural combat abilities. Her weapon of choice is a "tool," a device that channels her inner power into devastating force. What should have been a normal school year becomes anything but when her older sister materializes to serve as her mentor, determined to train Doris for the battles ahead. Other Panzers at the academy don't take kindly to a rookie princess wielding such potential. Challenges come constantly, each duel a test of skill, strategy, and nerve. Doris must navigate the treacherous social hierarchy of Teito while mastering her abilities under her sister's watchful eye. Between comedic mishaps and high-stakes combat encounters, she discovers that being born with power means nothing without the discipline to control it. This is sci-fi action wrapped in schoolyard comedy, where magical duels happen between classes and sisterly bonds become your greatest asset.