Mankatsu

7th Story: Pinky Panky 1 \ The Outsider (1x7)

:

Ken Nitenji, who aims to become the world's number one assassin, is determined to defeat his teacher at the assassin training school, Dr. Killer, to become number one. Dr. Killer sends his student assassins to take out Nitenji, but Nitenji recruits one of the assassins, Kamishina, to his side and takes revenge one after another!