Who was that?

Jake froze. Who was that person then? 

Someone who knew that Myriad Arrows was the grandson of the chairman of Horace. And someone who knew that Jake was being spied on by Horace. 

"This person either has to be an insider of Horace, or has to be someone who knows way too much." Jake was lost in thought, when a message pulled him out. 

Ping!

[What happened? Are you coming?]

It was a message from Myriad Arrows. He was still waiting at Croatia, and was confused why Jake was taking so long. 

He didn't know that Jake left because he was tracking a person. He thought that Jake went back because he forgot something. 

"Huh? It hasn't been that lo- Wait, it has already been five minutes? What the hell?" Jake was shocked. Time just passed in an instant, and five minutes was lost in Jake's thinking.