Ultraman: The Disk Creature Begins Saving the World Today

He transmigrates into the Ultraman world.

The good news: He becomes the leader of the Disk Creatures, the great Commander Black.

The bad news: It’s already the final episode.

Oh, merciless Heavens, why have you treated me so unfairly?

How can I, Commander Black, accept being nothing but a supporting character? Restoring the glory of the Disk Creatures is our solemn duty!

(This is not a villain story. The protagonist is good-hearted but neutral.)