Violent Witches: the Vindicator

Frank, a boy who secretly run with his sister who was suspected of being a witch when he was young They encountered a real witch on the way to escape, and his sister is killed. Frank, who was beside his murdered sister, is celebrated as "the hero who killed the witch." Frank, who grew up to be a young man, lived in the business of "killing a witch." However, only women who have no sin or power are killed by him. A witch who calls himself Shuto appears in front of him. She gives Frank three gems as "the power to defeat a real witch." Frank and Shuto's past becomes clear as he continues his journey to kill the witch.