In the year 122 of the Seigen - this is an era when many companies have expanded into space and built a huge economic circle. Sleta Mercury, who transferred from Mercury to Astycassia High School, lives a school life full of encounters and excitement as Miorina Rembrandt's groom and a member of the Gundam Company. Two weeks after the Quetta Factory Incident, Sleta spends his days in the academy, looking forward to meeting Miorina again. Meanwhile, Miorina is taking care of her father at the Benarite Group headquarters. The two are faced with new difficulties and impending decisions. The girls, with their own feelings in mind, face the powerful curse brought by the Gundam.