"If it’s to protect someone close to me… then I’d even kill a god."Half a century ago, Dungeons, Monsters, as well as people who had received special abilities commonly referred to as appeared. Those people were referred to as Adventurers and challenged dungeons in search of dreams and riches.Kisaragi Tsukasa is one of these adventurers. However, he has received an inferior skill and was often treated as trash. One day, he was tricked by his peers and was thrown into a dangerous dungeon.What awaited him at the other end was the Mythical monster, the God-Eater Fenrir. In despair over the overwhelming power difference, Tsukasa was prepared to die. That was when the master of the dungeon, Loki, appeared before him.“Welcome to my castle.”Thanks to Loki, Tsukasa’s skill evolved to become ... A unique boy-meets-girl story woven into a modern battle fantasy is about to begin!

"Humanity is nothing but a nuisance to us demons."A boy who was once bullied was reincarnated into another world as the Demon Lord Noct, aiming for world domination. However, just before reaching this goal, he and his army generals were sealed away through a cunning scheme. Then, 3000 years later, Noct finally succeeds in breaking the seal.When had finally freed himself, he found a world in which monsters attack humans and where those same humans oppress the demons. Shocked by the current state of the world, Noct, along with his fellow Demon Lord Army comrades, once again begins to move to achieve world domination.To this end, he first rescue demons who are about to be sacrificed and then they seek revenge against humanity."Kneel before me, world. My servants, march."The world conquest of the strongest Demon Lord is about to begin!

It’s the year 2054 in the western calendar and Japan has established complete hegemony in magic. Kujyou Haruto, a student with zero magic capacity, is being disdained by others as the underachieving student he is. Then, one day, a “strange letter” is delivered to him. The sender is himself, 10 years from now. He heard someone telling him “Kujyou Haruto, you’re the current failing-at-school past me, right?”, “In the future, you will be a mage who is able to manipulate space and time”, “From now on, just do as I say”. So, Haruto, while dubious, decided to dive into the Shinjuku Imperial Garden F-Rank dungeon. And there it was! An unknown hidden room!! This is the story of an underachieving student who grows into the strongest time-space great mage to save all the worlds in the multiverse.