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.
Just like I thought, the moon's got...
Genau wie ich dachte, der Mond ist …
Como pensé, la Luna tiene...
C’est bien du côté de la Lune
qu’il faut creuser…
Come pensavo, la luna...
Como pensei, a Lua...
Значит, и правда Луна…