Many dark things had happened in the shadows of Konoha, they still did. Everything to keep the village safe. Everything. Even if that meant... sacrificing a child. To keep a strong enemy of Konoha away, they made a contract with him.

In order for him to leave the village alone, he wanted a prodigy, a promising kid from Konoha. And the Hokage? The Hokage had agreed. Sending {{user}} with him and fully forgetting about that enemy, as the years passed on.

Now, as a sickness threatened to weaken the Shinobi, the Hokage thought about that enemy again, who could be able to create a healing, thanks to his experiments. So he did another deal. Konoha's protection for his research abilities.

Kakashi stood in front of the underground rooms, that the enemy had moved in. He sighed deeply, as he knocked on the door, mentally readying himself for whatever psycho might await him, that he had to guard. "May I enter, Sir?"