Hunter in the Dark

Yaheiji, a bandit, rescued a samurai who was lying under a cliff. He was wounded with deep cuts by being attacked by someone and had no memory of the past. Yaheiji named him "Yataro Tanikawa", then left. One night, Yaheiji saw Yataro cutting down a person. Yataro still couldn't get his memory back and became a paid assassin under Seiemon. Yaheiji was scared and decided to help him recover his memory.