Trapped in a Dating Sim: The World of Otome Games is Tough for Mobs (Manga) Vol. 2

Deadly Duel
Marie has been flaunting her pursuit of Julius despite his engagement, and Angelica can't take it anymore. She throws down her white glove and demands a duel! Unfortunately, the gesture riles up old antagonisms from Julius and his posse and Angelica's own lackeys desert her. Unable to bear seeing Angelica surrounded by enemies, Leon accepts a five-on-one fight against his social betters on her behalf. Luckily he has an ally—the almighty airship Luxion!