This is an Ultraman fanfic. Its title comes from the ending theme of Ultraman Leo, but the protagonist isn't Leo.
Light is the form of the Ultramen. But three hundred thousand years ago, the people of the Land of Light were no different in ability from humans on Earth, and their appearances were remarkably similar. But after the sun of the Land of Light reached the end of its life, everything changed. They found a shortcut to surpassing evolution and became a race akin to gods in the universe.
When the First Line swept through every corner of the universe, true super-evolution was born. The once-peaceful universe was thrust back into an age from billions of years ago. Just how many hidden hands lie behind the countless unknown civilizations? Why did the Alien Reiblood, who claimed to rule the universe, choose to preserve his spirit forever? What of the Guar Empire, the Visitors, and the ancient civilization...
It's all in this story, which begins in the world of Nexus!
This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.
