The witches' dance toys with Sanders――. The Earl High School Tank Club, an unknown entity in the high school tank battle scene, does not participate in the national tournament. Now, they are challenging a practice match against the prestigious Sanders University High School, one of the top teams in the country. Kohiyama Nozaki, chosen as the commander of the III Tank N model, has withdrawn from the front lines and is recalling the words of the "witch senpai"――. Meanwhile, the witches of Earl High School, entangled in their dance (ruby: Kalshari), are watching for an opportunity to counterattack against Sanders University High School. What will be the rhythm of the attack to counter Kay's Kalshari!?