From that point on, Teren has been dreaming about that entity. However, he either ignores her or just 'exit' that dream. That's why he was more tired than before.
Monday arrives and he got to his chair.
But the moment, he and Iesa made eye contact, his drowsiness is instantly removed.
Nick saw this and just shrugged his shoulders. He no longer has the obligation to care about them. However, he did get confused over one thing.
'Why are they still a couple? Do they not want to be official because of Teren's plan? After all, he didn't include Iesa in taking over the Spirit Plane. Maybe she's his weakness and he needs to remove his link to her? Yeah, maybe that's it.'
Nick wasn't so far off but he's still mistaken. Not that he was to be blamed for it, he didn't know the whole story.
When Hanon came into the classroom, the same scene happened. He was able to Monday into something fun. But when Teacher Jerad came in, the students felt tired.