Samurai X: Trust & Betrayal OVA

Taken by slavers when he was a child, Himura Kenshin is rescued only when an encounter with bandits kills off everyone but him. He is found by a master of the Divine Justice School of Swordmanship, a school so deadly that to train in it, means death for either the master or student, there can only be one master. Taken by the master, Kenshin is trained in this school, only to leave before finishing so that he may join the Meiji restoration and help prevent further tragedies like his own.