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.
Sir Isaac...
Sir Isaac, wie Sie wissen,
ist er noch ein Kind.
Isaac-dono.
Comme vous l’avez si bien dit,
ce n’est encore qu’un enfant.
Nobile Isaac...
Isaac-dono...
Господин Айзек.
Вы сами видите, что он ещё ребёнок.