Ultraman: Lost My Memory? Tell That to My Muscle Memory

[Ultraman canon + No System + Ultraman spirit + Slow burn + Ensemble cast + Amnesia from the start + A completely new Omega, with a wholly original setting; see the chapter-one comments for an image of his appearance]

Ace: Hey, Omega, what are you looking at now?

Omega: I feel like I used to do this before I lost my memory, too.

Ace: ?

Omega: Gaia, is this how you switch forms?

Gaia: Yes. It's the power of the Sea Superman and the Earth Ranger combined.

Omega: I don't quite understand, but I think I can use some form-switching abilities too.

Gaia: ?

[Order of the main worlds: Ace → Leo → Gaia → Mebius]

[Side worlds (movie-style): The first story begins in Chapter 36: “Showdown: Who Knows How Many Ultraman Warriors.” I thought it over and decided to start with the first one. When the main-world story is finished, I'll ask everyone what they'd like to see in future side worlds unrelated to the main plot.]