There's Some Weird Guy Among Us

He mixes in human cities with a human body, and walks in the world of giants with an Ultra body. "You can think of me as a human, or you can think of me as a giant, but in fact, I am just an Ultraman transformed from a human. Remember, my name is Saiyan, Urudaraman, Saiyan!" The giant race that spanned the continent tens of thousands of years ago suddenly disappeared, and then the human race rose. And he, an Ultraman from the Kingdom of Light, unexpectedly came to this world... This is the story of a man who accidentally got into the giant race...