[Sunred]

Here's a rough translation of the plot for the show from the official site by me.

Somewhere in space once existed planet H12(H-One-Two), a planet which closely resembled Earth, but was attacked by Space Kaiju from other planets.
As the planet fell and was eventually destroyed, one alien managed to escape to Earth.
That alien was "Teo," the lone alien who will shape up to become an "Ultraman."

On Earth, he is Ibuki Mitsuishi, a third-year student in the Department of Veterinary Medicine at Meishin University who lived a peaceful life on campus, connecting with the animals he loved despite being unable to adapt to the norms of the planet.

But when Earth faces a crisis as the Space Kaiju that destroyed his home arrives to attack the planet, and his strong desire to protect overcomes the dreadful memories of his past, a dazzling light transforms Ibuki into a giant of light in blue!