A not-quite-typical power fantasy + no romance + an original Ultraman as the protagonist + no following the canon plot + wildly inconsistent power levels + original monsters
After Fester stopped Belial from stealing the Plasma Spark Tower, the two of them were exiled to a chaotic planet on the very edge of the universe.
The locals called this planet Earth.
Pushed by some mysterious force, they formed Earth's Defense Force.
Its members were:
The introverted, timid Asakura Riku, who was inexplicably popular with girls;
Ooka Daichi, obsessed with science and prone to saying startling things;
Natsukawa Haruki, a mecha pilot who likes Decker;
Manaka Kengo, who wants every living thing to be happy;
and the logistics officer, Mijikashi Saki, who for some reason suddenly started quoting famous people.
Anyway, they just muddle through and protect Earth like this~
That's the general idea. I really don't know how to write a synopsis.
Also,
I apologize in advance for everything.