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Synopsis

On Mars in Fourth Tokyo, a select classroom at Kirishina Corporation drives aerospace research: A-TEC, led by talented engineer Kaito Sera, expects a new transfer student. That newcomer is Nagisa Kiryuu, the CEO's younger brother, who arrives with orders to terminate the program. To prevent their unit's shutdown, Kaito and his peers rush to produce a successor to their flagship rocket, the X-2, while Nagisa advances within the company pursuing his own objectives. As both sides pursue their goals, layers of corporate secrecy and internal politics emerge within Kirishina Corporation. The narrative follows Kaito, Nagisa, Kaito's sister Mizuki, and A-TEC's test pilot Iris Shirasaki through a tense mix of organizational conflict, covert maneuvering, and developing personal relationships. As conspiracies pull Nagisa and A-TEC deeper into the corporation's affairs, bonds form and past histories surface while they strive to resolve their classroom's crisis.