After a hundred thousand years of slaughter in another world, Lu Chen has ascended to the rank of Immortal Emperor, worshipped by all the immortals.
Just as his achievements reach their peak, the System, dormant for tens of thousands of years, suddenly jolts back to life with a warning: Blue Star is being watched by countless worlds. The ancient seal is growing weaker by the day, and countless tigers and wolves from beyond the universe are eyeing this blessed mother planet.
Twelve wanderers return home and fight a bitter victory in the battle to destroy the Ruins. But Blue Star remains surrounded by wolves. The planet's source sends them back to the points in time before they each transmigrated, both to make up for past regrets and to prepare for the coming war in their own ways.
Lu Chen returns to his senior year of high school. The Immortal Emperor, who could shatter stars with a raised finger, is back amid the bustle of everyday life.
He establishes a training camp for the Guardians, suppresses spatial rifts between worlds, and helps the Dragon Kingdom forge a bond with the fate of the Human Emperor…
“I was going to keep treating you like an ordinary person, but you've gone too far. Fine, I won't hide it anymore. I'm the Immortal Emperor, and I don't eat beef.”
The twelve guardians who have stood watch across the ages will reunite at last, and Blue Star will take its place on the stage of the myriad worlds.
…
In the early stages, the foundations of Blue Star are steadily reinforced. To keep things from getting dull, the story goes all in on the thrills. Who could say no to showing off in front of everyone at a high school mobilization rally when faced with demons from beyond the stars?
In the middle stages, the forces of this world grow strong and tear through the barriers of time, unifying the timelines. From protecting their home planet to making their name throughout the vast heavens, the campaign of Blue Star's human race begins here.
I found it from some comic theme keywords, and it's more designed than expected. I hope I can keep writing.