How to Walk Through Another World

One day, a boy named Kaga Tatsuya is suddenly summoned to another world. He learns that his summoning was merely a coincidence, and that there is no world crisis, demon king, or war threat. Moreover, he's told there's no way to return home, leaving him at a loss. However, this is a world of swords and magic. Armed with his natural curiosity and positive attitude, he decides to travel this world and search for a way to return to his original world. But he harbors a secret. Since childhood, he has frequently traveled back and forth to another different world—a secret he keeps. An adventure fantasy unfolding with him, his companions, and their guardians.