There was only one hour left for that event to happen and Ken was completing his final preparations. He was the weakest of the Demon Lord's right-hand men, and he sensed him and arrived 10 minutes early.
Ken thought he changed the future because he knew the future and was stronger than before. At noon, when the sun is directly overhead, it suddenly gets dark and the fog increases.
Ken gets to the top of the tower and looks in the direction Rokuro came from. He sees Rokuro and his demon army and there were enough to destroy the city in a few minutes and their numbers were greater than the previous time.
Before they came to the city, he informed his father, and his father knew in advance and had prepared an army. When the demons pass through the city gate, the army suddenly appears and a quarter of the demons die.
Rokuro orders his demons to "Stay behind" and Ken asks his father: "How did you know?" His father said, "You have been acting strangely for a month and you have become very strong.
Rokuro looks at the city, Ken tells his father to "run away" and his father shakes his head and says "I'll leave it to you."
Using his space sword ability, Ken slices space right through the middle of the demons, slicing all the retreating demons in half. Rokuro gets very angry and takes out his sword and runs towards Ken. Ken also runs towards Rokuro and when their swords collide, the surrounding buildings collapse.
It's a good thing Ken's father evacuated the city beforehand, otherwise everyone in the collapsed buildings would have died. At that moment, Rokuro took out a small dagger from his pocket and looked very dangerous.