In the Fourth Tokyo colony on Mars exists a classroom brimming with the top minds of Kirishina Corporation, who are leading the charge in aerospace development through their program A-TEC. The mastermind engineer Kaito Sera is at the helm, eagerly anticipating the arrival of the latest addition to their team. But their newest student is anything but ordinary. Nagisa Kiryuu, newly appointed chief of A-TEC and the CEO's younger brother, is on a mission to shut the program down. To save their classroom, Kaito and his students work fervently to design a replacement for their most potent rocket, the X-2. At the same time, Nagisa climbs the ranks within the corporation, working towards his own objectives. However, their battles contesting each other soon expose a more complex web of intrigue within Kirishina Corporation. The tale of Classroom☆Crisis centers on Kaito, Nagisa, Kaito's younger sister Mizuki, and A-TEC's test pilot, Iris Shirasaki. It's a gripping story of political warfare, romance, and intrigue as Nagisa and A-TEC become more embroiled in Kirishina Corporation's conspiracies. They grow closer through their troubles, revealing their pasts and strengthening their friendships to overcome their classroom crisis.