Undefeated Bahamut Chronicle

Lux Arcadia falls into the baths of the all-girls Royal Knight Academy and is challenged by Princess Lisesharte Atismata.

Lux begins his life at the academy and meets an old childhood friend, much to Lisesharte's chagrin; Lux and Lisesharte face old, dark memories of the recent past.

Lisha throws Lux a party and a week of Lux's time is offered as a game prize; the outcome could be worse, but his new position lands him in an awkward and dangerous place.

Lux mentally prepares for his duel with Lord Barzeride; the nobles of the New Kingdom order an investigation of some ancient ruins, which may hide a powerful abyss.

Krulcifer reveals her painful past to Lux; in an act of sympathy, she decides to release him from their agreement and begins to prepare for her duel against Barzeride.

Lux meets a high-ranking noble girl under false pretenses and he's put in a tough spot; she wants him out of the school.