When Zen was about to head out and go to the Pontiac Academy, he suddenly remembered something: 'Ah wait... Didn't one of the professors die during the beast outbreak? They should be recruiting new professors to teach in the academy.'
Thinking of this, he exited his ship and went to look for Ian. He did not have Ian's contact number, so he had to go to the trouble of looking for him.
Ian actually agreed to join the organization that his young master was planning to create. He had watched and seen everything Zen had done up to this point during the short period of time he was together with him.
He was indeed flabbergasted at everything, and so he believed that Zen would eventually become someone the world would fear in the future. He decided that it was worth following him.