"Now, where is that idiot gone to?" Eru ran in the endless dark corridor, searching for Long, sensing for his presence. Right after Eru said that, he heard a loud roar coming from nearby, "Ah, that's where that idiot was", Eru muttered before he rushed towards the direction of the roar. Eru found himself right in front of a door, "So that idiot is in here, huh?" Right when Eru was about to open the door, the ground around him quaked, and he could hear a loud noise beyond the door. "Tch, that idiot", Eru scratched the back of his head, "What if he destroys this building?" Eru mumbled before hurriedly opening the door.