Light Novel Volume 10/Synopsis

Chapter 14: Ring Name
Naofumi and the party uses an alias and wearing masks for the tournament to avoid attention. The first match is started, the opponent team is Topak Family, Naofumi's team won swiftly. The second match is against a team solely made of three monsters and again won swiftly. After the matches, Naofumi sent Filo back to Seatto, Raphtalia is sent to monitor the Lurolona slave auction winners. Rishia and Raph-chan are gathering information regarding coliseum fighters.

Chapter 15: Surprise Attacks and Conspiracies
Naofumi headed back to the tavern where he met Nadia and surprisingly she noticed that Naofumi was participated in the tournament, despite the effort to hide his identity. Nadia brings Naofumi for a night stroll but they are ambushed by mercenaries. Nadia defeated the mercenaries swiftly and pointed out that these ambushes was the reason why some participants didn't appear in the tournament. Nadia told Naofumi to give up if they happened to fight in the tournament, then they went separate ways. After gathering information regarding the participants, Rishia reported that Nadia is an opponent they should wary of.

Chapter 16: Nadia
Due to the increased opponent's absence, Naofumi won by default for the next several days and reached the semifinals against Nadia. Nadia fought so well, even capable of canceling Naofumi's Aura buff and bested Raph. The arena then altered by the spectators to Nadia's favor. The spectator's interference made the fight went back and forth but in the end Naofumi's party cornered Nadia. Nadia gets serious and transformed into her beast form. When Nadia preparing an attack, Raphtalia just stood in a daze. Naofumi moves to protect Raphtalia, and then she uttered "Sadeena."

Chapter 17: Farce
Nadia suddenly halted her attack. Raphtalia and Nadia conversed and recognized each other. Nadia suggests them to pretend to continue the battle while explaining each other's situation. After Raphtalia and Filo staged an apparently devastating combo, Nadia admits defeat.

Chapter 18: Exhibition Match
Right after the match, the organizers forced Naofumi and Sadeena to team up and participate in an exhibition match under heavy handicap against Murder Pierrot who isn't even participating in the current tournament. With Filo's Humming Fairy skills and Sadeena's guide to using cooperative support magic, they managed to defeat Pierrot. Everyone was surprised to find that Pierrot's body was just wood and Pierrot appeared in another body. Pierrot talking to Naofumi and the party but the voice is disturbed by crackling and static noise, leaving an order to get stronger as the only perceptible message. After the talk, Murder Pierrot disappeared with an explosion. Naofumi is declared as the winner and headed back to the waiting room.

Chapter 19: Big Shots of the Underground
Sadeena went to confront her boss with Nao, followed by Rishia, Raph-chan, Acc dealer and Slave trader. With Acc dealer and Slave trader's backing, Nao proposed a deal to put Sadeena's bet to the next match so her previous contract can go on. In the next match, which is a throwaway, to begin with, Nao easily won.

Epilogue: Come-On
Naofumi obtained fifteen slaves and bring them to the village. Dialogues between Naofumi and the villagers, including Sadeena's attempt to claim him due to her defeat in a drinking contest.