The discovery of an evil jutsu!

He had been successful. He had killed Itachi and from him, he had inherited his Mangekyou Sharingan. He had been approached by a man who named himself Uchiha Madara. From him, he had learned the truth, and from him, he had learned much about the power that was still within him.

However, Sasuke felt there was still untapped potential in his Sharingan. Madara had confirmed this, but the only advise the elusive person could give him was to infiltrate his home again and look for more clues. Thus, he had gathered his Team Hawk and infiltrated Konoha, the location: The old compound of the Uchiha clan, which was still untouched ever since the massacre.

With the help of Karin, Sasuke had discovered a secret basement right underneath the room where he had witnessed the **** of his parents. He entered the room down there with Karin, while Juugo and Suigetsu remained upstairs to watch out for anyone who might discover them.

Down there, they found a small library. While Karin went on to look through some of the medical books stored down there, Sasuke was drawn to a small lecture about the mythical abilities of the Sharingan. As he read, he found a list of supposed jutsu that only those who had obtained the Mangekyo were able to perform. A quick check prove that this book was indeed written by none other than Uchiha Madara himself...

So that was why the old man had sent him here... to find this book. He might have had an ulterior motive for Sasuke to find it, but for now, Sasuke flipped through the pages. All the jutsu described here were incredibly powerful or useful in battle or other situational cases, but all had their drawbacks. Except one...

According to the text, it was a smaller version of Tsukoyomi, but with slightly other effects. It made the victim completely succeptible to any vocal command issued by the Sharingan-user. All that had to be done was to maintain eye contact while the command was issued and the person would carry out whatever order was given with the best of their abilities.

He found that Madara himself had scribbled down the extents of the jutsu. It was impossible for example to order commands that were practically impossible to perform for any person, like disappearing and appearing on the other side of the world. Other than that, he had proven that the control the user had over his victim was nearly absolute.

Sasuke memorized the jutsu. It was simply, required little chakra and he was able to pull it off with just a moment of preparation. All he was still curious about was: Did it really work?

At that moment, Karin came over to his side and glanced over his shoulder, peering into the small book Sasuke was reading. "What is this, Sasuke-kun?", she asked.

Sasuke knew then that he had found his guinea pig. "A jutsu that I shall test now...", he said ominously and turned around, looking deeply into Karins eyes, as his turned into a blazing red when he activated his Sharingan.

Karin stepped backwards, frightened by the sudden change in Sasuke, the hostility he exuded right now. Still, she refused to believe that he would attack her. After all, she had helped him, right? "What do you mean, Sasuke-kun?", she asked cautiously, but at that point, Sasuke had already gathered the necessary chakra.

"Mangekyou Sharingan: Kokoro no Soujuu (Control of the Heart)!", he declared. He felt how the chakra was channeled through his eyes and he felt a tug when he felt how his jutsu penetrated Karins mind. Her eyes glazed over as her mouth hung slightly open.

A success, one might think. Now he only needed to find out if the jutsu was properly working. He already knew that Karin would do pretty much anything he asked of her without much hesitation, but this jutsu should have erased any minimal resistance to his will she might've had.

Thus, he knew of one particularly good order that would test this jutsu as well as assure him some pleasure. "Karin, strip, get on all fours and raise your ass in the air!", he commanded. His cock already hardened at the thought of what he would do with her, no, what he would do with whoever fell under this jutsu... if it really worked.