Ultraman: I Am an Ancient God! I Am Ultraman!

A modern man unexpectedly arrives in a world that is both strange and familiar. Here, there are monsters, a Dark King who brings about the end of the world, and shining giants, ancient gods who bring hope. Before he can even figure out what is happening, he is captured by followers of an evil god. They intend to create a vessel for an Old One to enter this world, and carry out a series of inhuman experiments, fusing part of Gatanothor with his body. Eventually, they deem him a failure and cast him aside, but he manages to survive. The experiments leave him lost and confused, and he forgets his past and even his name. He comes to think of himself as the Evil Heart of an Ancient God, with only one thing left in his mind: “Di… Ultraman… ya.” At last, under the name Diya Ultraman, he begins his own legend…