"Now that I'm back, I won't let those I love die again!" The Dark Labyrinth - The deadliest catastrophe known to mankind. Desir Arman, one of the six survivors of the human race, is inside the labyrinth. The six manage to complete the last level of the maze, but they fail at the end and the world comes to an end. However, just when Desir thought he would meet his death, what appears before his eyes is the world... Thirty years ago? Desir is sent back in time to when he enrolled at the best magical academy in the nation, Havrion. He is reunited with his precious friends and is determined to change the past and save those he holds dear...! Three years until the emergence of the World of Shadows! Change the past and gather powerful companions to save humanity!
Killed saving a stranger from a traffic collision, a 34-year-old NEET has been reincarnated into a magical world as Rudeus Greyrat, a newborn baby. With knowledge, experience and regrets from his previous life retained, Rudeus vows to lead a full life and not repeat his past mistakes. Now endowed with a tremendous amount of magical power, as well as the mind of an adult, Rudeus is seen as a genius in the making by his new parents. Soon, he finds himself studying with powerful warriors like his swordsman father and a wizard named Roxy Migurdia - all to hone his apparent talents. But despite his innocent exterior, Rudeus is still a perverted otaku, who uses his wealth of knowledge to make moves on women that he could never do in his previous life.
Iwatani Naofumi, an otaku like any other, finds a book in a library that transports him to another world. He is given the mission of becoming the Hero of the Shield, one of the Four Cardinal Heroes who will face the Waves of Catastrophe alongside the Heroes of the Sword, Spear and Bow. Excited by the adventures, Naofumi sets off on a mission with his team. However, a few days later, he is betrayed and loses all his money, dignity and respect. Will he find a way out of this desperate situation?
