Hitsugi no Chaika: Avenging Battle

Synopsis

Toru and Akari attempt to infiltrate the castle in order to steal the remains but their mentor Shin appears, forcing them to escape. Meanwhile, Guy brings Niva to Stephan Hartgen, who is eager to start a new war, as he believes that warriors like him can be only worthy in combat. The next day, the tournament begins, and while facing other contestants, Toru and Chaika meet Vivi and Nikolai, but instead of fighting, they decide to share information instead, and learn about the twin Chaikas that are always beside Hartgen. Little they know that the twin Chaikas answer to a third one, who has her own agenda. As the Council of the Six Nations discuss if they should launch an attack on Hartgen, Konrad is informed about the situation there while the pairs composed of Chaika and Toru, Boghdan and David, Akari and Fredrika, and Vivi and Nikolai advance to the next stage of the tournament, oblivious to the fact that Stephan is aware of their presence and is making arrangements for them to fight each other.

(Source: Wikipedia)