In this manga, the main character is transported to another world. However, he is not the only one that is transported to this other world; he is transported with I believe a guy and a girl. The king has the head magician check their capabilities, and the other two that are not the MC are said to be able to be super powerful, or maybe be hero's, while our MC is said to have no talent or anything.
However it turns out that our MC is already proficient in the magic of our world, which is more advanced then the magic of the world he is transported to, and his goal is to research our world and find its secrets. I believe that the magicians in our world are called researchers or maybe philosophers something along those lines.