Ootsuji Detective Agency has a new case. Now, facing the strangeness of the "mass disappearance" bewildering society, Detective Soutarou takes the investigation head on!.
17-year-old Suletta Mercury transfers to the Asticassia School of Technology to train with her Gundam Aerial when she comes across a young woman named Miorine Rembran.
Suletta is forced into a rematch against Guel to prevent her expulsion from school and the Aerial from being scrapped. To ensure his victory, Vim equips Guel's mobile suit with an AI auto-pilot, ignoring his son's desire to win on his own.
Everyone is shocked by Guel's sudden proposal, including Suletta who panics and rejects him. After failing an exam, Suletta asks the students of Earth House to be her support crew, but the Earthians are apprehensive to help a Spacian.
Elan is ordered by the leaders of Peil Technologies to investigate Suletta and the Aerial. Elan believes Suletta is like him, and when he invites her to spend time with him on their day off, their fellow classmates interpret it as a date.
