A young salary man died in an accident was reborn in another world filled with magic and demons. As a baby, he was picked up by the patriot hero "Sage" Merlin Wolford and was given the name Shin. He was raised as a grandson and soaked up Merlin's teachings, earning him some irresistible powers. However, when Shin became 15, Merlin realized, "I forgot to teach him common practice!" Diseum, king of the Earlshide Kingdom, recommends Shin to attend his Magic Academy, on the agreement of not using Shin for political warfare. In the capital, Shin rescues two girls, Maria and Sicily, from thugs, and later he would inaugurate a club that consist him and others. A nonstandard boy's fantasy life starts here!