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.
Well, with us adventurers involved,
Ich kann mir vorstellen,
dass es noch komplizierter ist,
Bueno, seguro que todo es más complicado 
con los Aventureros metidos en la situación.
Même si en réalité,
il faut bien admettre
Beh, con il coinvolgimento degli avventurieri,
Bem, com os Aventureiros envolvidos
Впрочем, с нами и авантюристами