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.
Isaac?
Bruder Isaac?
¿Isaac-kun?
Qu’y a-t-il ?
Isaaccuccio?
Isaac-kun?
Дорогой Айзек?