Isaac and the Black Sword Knights are responsible for training the Maihama army. While he's in Maihama Isaac gets to know the new crown prince of Maihama, a young boy named Iselus.  Iselus respect looks up to Isaac and respects him.
At a party for the crown prince's birthday, assassin's make an attempt on his life.
Lord Iselus, this is fruit juice from my land.
Prinz Itherus,
Icelus-sama, este es un jugo 
de frutas de mis tierras.
Sire Icelus.
Nobile Iselus, 
questo è succo di frutta della mia terra.
Iselus-sama, este é um suco 
das fruta das minhas terras.
Владыка Исельс,