The Legend of Red Giant in Mobius (Ultraseven x Sonic the Hedgehog Archie)

A long time ago, there was once a planet called Earth. As the planet lived in peace, fighting off against an invasion force of aliens and monsters, there was one known legend, and his name is Ultraseven, a giant being defending the planet in 1967. However, after a big fight that becomes a life threatening process from all of his injuries piling up, he finally goes back to his home planet. However, as planet live in peace, the alien Xorda attack the moment Dr. Ivan Kintober and scientists dissect one of its kind to gain knowledge. But the gene bomb only mutates them slightly as they become physically & mentally stronger. However, the planet, now known as Mobius, creates a new lifeform, Mobians. After war between two races, Overlanders left on a spaceship as Mobius takes on home while other remaining humans left somewhere away from all conflicts.

However, there is one boy from the 2010s, and his name is Daiki Sabat, as he now becomes resident of Mobius after he was found by Freedom fighters in an abandoned facility as he later helped Freedom fighters with supply and melee combat. But the moment he risk his life to save young fox Mobian, Miles "Tails" Prower, he was confronted by Ultraseven the moment he was away from others as Ultraseven was touch to see one human care towards different race he never seen before unlike the slight-mutant humans Overlanders he had heard and witness to. Touch by Daiki's heroic actions to risk his own life without hesitation towards those that are different being treated by those that never seen a human before, he merged with Daiki as he becomes Ultraseven's host to fight against new threats as he soon question the actions they bring against his view and beliefs in this new world.