Ginpaku no Paladin

Synopsis

A criminal incident occurs on a train. A small good-hearted boy who could not move in this incident wants to help and save everyone. A mysterious old man suddenly appears and, using brilliant swordplay, is able to fight the the criminals off. The boy is moved by the old man's majestic figure and becomes determined to be strong like him. This starts his learning of fencing as he becomes the old man's disciple. A man must be strong in order to protect the things he loves!!! Passion! Hot-blooded fencing story! (Source: Shogakukan)

Anime adaptations