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.
I see.
Verstehe. Lass mich wissen,
wenn noch etwas passiert.
Ya veo.
Très bien… Tenez-moi au courant
s’il arrive quelque chose.
Capisco.
Entendi.
Понятно. Если вдруг что —
сообщайте.