Knights of the white oath

Knights of the oath are knight squads founded by the best knights at the Goldcrest kingdom. These squad were the Red oath,Blue oath,Purple oath,Green oath,Bronze oath,and the White oath.These oaths were put together to keep the kingdom safe and defeat the Dragon tribes.
Hagita,Nobora,And Sakita are all siblings until one day the went food hunting and stumbled upon a dragon that looked demonic.This dragon destroyed there family and village.They decide to try and leave but the dragon caught one of the siblings.That was nobora.Present time Hagita,Sakita and friends are entering the Knights of oath exams to finally be able to get revenge on the dragon tribe. What adventures await the knights oath squads?