The knight chooses to save the dragon rather than the princess because he considers her a monster compared to the dragon.

The knight was chosen by the king himself to save his daughter from the clutches of the dragon. However, when the knight found himself in the dungeon, he immediately realized that something was wrong here. He initially felt like he was being deceived, but he couldn't prove it. Now the knight has to save the dragon from real monsters that have been deceiving the kingdom for a long time.