A man who was reincarnated in another world as a 9th class wizard and retired after saving the continent from a dragon war. He decides to open a small restaurant in the countryside, but his routine is anything but ordinary. On the second floor of his restaurant, there lives a black dragon who has transformed into a woman, named Rurin. She is greedy, cute and loyal to him, but also ignorant and clueless about the human world. They live a fun and warm life, serving customers, solving problems and growing violets in the garden.
Altair, the warrior king of humanity, is resurrected after being killed by a powerful monster, only to find himself sixty years in the future with a completely new body. Starting from scratch, Altair must learn how to survive in this strange new world, facing countless mysterious and terrifying unknowns, while simultaneously evolving his originally fragile body to become a powerful force to save humanity from the ravages of demons.
On his deathbed, the Great Philosopher expressed remorse, as he was never able to learn magic. Five hundred years later, he was reborn as Mazel Loran, the son of a feudal lord. His family believe him to be a late bloomer in terms of his magic, but also think he’s the next incarnation of the Great Philosopher. But Mazel has a secret that nobody else knows: while he does not have any magic, he has experience with “physics”!