An old promise between friends is put to the test as their loyalties and ambitions change. But against Rekka's invincible general, Granedger may not stand a chance.
No, Kai. Your biggest enemy is Back Arrow.
.لا يا كاي. عدوك الأكبر هو باك أرو
Das stimmt nicht, Kai.
Dein schlimmster Feind ist Back Arrow.
No, Kai. Tu mayor enemigo es Back Arrow.
Tu te trompes, Kai.
Ce n’est pas moi, mais Back Arrow.
Ti sbagli, Kai. 
Il tuo più grande nemico è Back Arrow.