Guilt

A part of Alex kept telling him to try and not offend the senior, but the part that was controlling him right now couldn't help but get annoyed and angry at the reasoning behind the senior's action.

He could understand the motive behind his action. He had wanted to go back home, not be stuck in a world that was not his.

If Alex was in the same situation, he would definitely be desperate as well and look towards using similar means to reach his goal.

However, disrupting and tearing apart the lives and relationships of millions of mortals would never be the way he could ever choose. That was simply immoral and unethical.

"I still don't understand," he said. "What's wrong with taking the normal way back? Is it that difficult?" 

"It is," the senior replied. "The act in itself isn't any difficult at all. I simply have to ask one of them to lend me their teleportation token so I could go back to a higher world."