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.
second-oldest daughter Lenessia, 
and Iselus, the youngest child.
la secondogenita Lenessia 
e Iselus, il più giovane.
a segunda mais velha, Lenessia,
 e Iselus, o mais jovem.