I Picked up a Sword of Justice

"Young man, please pass on the fire of justice!" "Please allow me to refuse." A young man, a holy sword, and a fantastic journey through time. From young to mature, everyone has their own justice in their hearts, so who is right? In the face of evil, should we kill as a warning to others, follow the temptation, or ignore it? In short, this is a story about being kidnapped by justice and meddling in other worlds.