Invincible Castle Episode 9

Having Hakuryuu burnt out from the long tiring journey, Sanzo-ikkhou decided to stop by a city where there the people there live their everyday life according to the '780 Discipline'. The city is surrounded by a fortress which is said to be unbreakable. Upon arrival, Sanzo-ikkhou are greeted by flying arrows as they were thought to be intruders. The city lord, Souryu later met them and apologized for the sudden attack. They were welcomed into the city and later invited to a meal. Being used to living free and uncontrolled, Sanzo-ikkhou felt constrained and uncomfortable living in the rule-driven city. When youkais came to attack the city, they were well prepared and armed. When the city lord discovers that his son, Kensei is outside the city fortress, he decided to go by the rules and ordered his men not to open the gates of the fortress. What would become of Kensei How will the people of the city survive if they were confronted by a situation which is not in the rule-book?