No Justsu!!!

Adam 

Iron Fist

Abandoned as a child, Adam grew up in the streets of Korea. He soon learned the ways of criminals, including becoming well versed in martial arts. Adam was given the nickname "Iron Fist" because he had once punched through a man's body. He moved up the ranks of Korea's leading gang, the Triad, to become the right-hand man of its crime boss. The boss took Adam under his wing and eventually knew him as a son. But there was a betrayal amongst the Triad. Cops had gotten a tip about the Triad's last scheme and it was traced to one of their own. During a raid of the boss' mansion, the cops had killed him and left Adam as an orphan once more. He swore revenge on whoever took away his "family". Reorganizing the remaining Triads, Adam learned that the traitor had gone to Japan. However, he was under the watchful eye of the government, so Adam posed as an exchange student to Kirikawa High School in Shinjuku. There, he had contacts that were bringing him closer to the traitor. The draw of martial arts was too powerful and Adam soon joined a ninja clan at the school. There, he served as a bodyguard, assassin, and all around badass.