Kidou Senshi Gundam: Suisei no Majo

Suletta Mercury leaves her home planet to attend the Asticassia School of Technology, where students duel to decide who is right and who is wrong. The winner of the duel would receive Miorine Rembran as a fiancée, chosen by her father.

But when Miorine's current fiancé, Guel Jeturk, demands her to move in with him, Suletta disagrees. So he challenges her to a duel, which she wins. She gets detained for piloting an illegal Gundam, and her win is voided. To stop this injustice, Miorine proposes another high-stake duel. Suletta must win to keep her freedom and the Gundam Aerial she treasures.