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'm sorry I'm late, Grandfather.
Vergib mir die Verspätung, Großvater.
Disculpa el retraso, abuelo.
Bonsoir, grand-père.
Scusatemi, nonno.
Desculpe pelo atraso, vovô.
Я задержалась, дедушка.