Hokuto no Ken

Synopsis

Before accepting Kenshiro's challenge, Souther recalls his tragic childhood, his rejection of the need for love and his motive for building the Holy Cross Mausoleum. Kenshiro fights Souther again, firstly using Shu's technique, out of respect for his dead friend. Meanwhile, Souther opens a secret room in the mausoleum, revealing the body of his master, Ogai. Kenshiro uses his Hokuto Shinken, but it seems ineffective against Souther. However, Ken believes that he has finally learned the secret of Souther's invulnerability.

(Source: Wikipedia)