Nick used to be a member of a veteran adventurer party, helping his undisciplined friends with the accounts whenever he could. But what was his reward? Getting accused of embezzlement and kicked out by the leader he respected. Before long, he finds a few other jaded adventurers and kindred spirits, and together, they form their own unstoppable party!
Iwatani Naofumi was summoned into a parallel world along with 3 other people to become the world's Heroes. Each of the heroes respectively equipped with their own legendary equipment when summoned, Naofumi received the Legendary Shield as his weapon. Due to Naofumi's lack of charisma and experience he's labeled as the weakest, only to end up betrayed, falsely accused, and robbed by on the third day of adventure. Shunned by everyone from the king to peasants, Naofumi's thoughts were filled with nothing but vengeance and hatred. Thus, his destiny in a parallel World begins...
When a series of animal bodies that rot away after a single night begin appearing in a remote mountain village, Inugami, a detective from Tokyo who specializes in the occult, is called to investigate.
While working the case, he befriends a strange boy who works in the field every day instead of going to school. Shunned by his peers and nicknamed "Dorotabō" after a yokai that lives in the mud, he helps Inugami uncover the truth behind the killings — but supernatural forces are at work, and while Dorotabo is just a nickname, it might not be the only thing about the boy that isn't human.
The story follows a 34-year-old man who is killed after trying to save someone from getting hit by a car. He soon finds himself reincarnated in a magical world as Rudeus Greyrat, except that he gets his whole life reset, starting as a baby.
With all of his knowledge from his previous life, and a new heaping helping of magical ability, Rudeus quickly becomes a formidable warrior ready for adventure. Oh, and he's still a total pervert.