The Monster 

Tengoku squatted in front of Hitori. "You wanted to know, then yes! Yes, we bribed a corrupt teacher from your school to create a secret dungeon while you were sleeping for the past week."

Hitori opened his eyes wide. He had trouble believing it, then he laughed. "Since when did the proud, egoistic, and genius scientists start going to a wizard for help?"

Tengoku stared at him. "In our world, a mercenary is a mercenary, does not matter whether he is a wizard or a scientist or a scientist possessed by a dark wizard."

Hitori's laugh faded, he closed his mouth and looked down. 

"And your friend, the earth did not just crack and swallowed him, the wizard pulled him into his dungeon. Where his enemies will take care of him while I... take care of you." 

"Why?" Hitori asked weakly. "Why are you doing this?"

"Hah." He shook his head. "Do not use that---"