


Deciding to help the team win the tournament so they can wish her treasures back, Tiamat asks Issei to let Ouryuu join his team so he can help them win and gain some fighting experience as he is to become the next head of the Nakiri clan.

At the Occult Research Club, Ouryuu and Millarca came to the club room to introduce the team to Tiamat, one of the Dragon Kings, who has come to demand Ddraig to give her the treasures he borrowed from her before his fight against Albion in the Great War. They also meet with the supervisor of Dulio’s team, which is revealed to be Rudiger Rosenkreutz, the seventh champion of the Rating Game. In Volume 23, Issei and the team went on a meeting with Team Trump Card of Heaven at the Hyoudou Residence to introduce their members to each other and discuss on their upcoming match. After the match, the team learned their next match will against Team Trump Card of Heaven and Elmenhilde arrived at the Hyoudou Residence to request to Issei to let her join his team. During the match, Issei talked with Baraqiel about his relationship with Akeno and confesses his love for her in front of him and the whole stadium, and finally defeats Baraqiel with his Crimson Blaster. This leaves Baraqiel heartbroken and he vows to defeat Issei. The team were set up against Team Lightning that was led by Baraqiel, where Issei meets with him at the Azazel Stadium and Baraqiel asked Akeno about who she will be cheering in their match, which she revealed that she will be cheering for Issei. In Volume 22, Issei and the members of Team Red Dragon Emperor of the Blazing Truth arrived at the Azazel Cup opening ceremony through his familiar Ryuuteimaru.
