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An ordinary male protagonist has been jealous and bullied by his male classmates because he was favored by a goddess. Unexpectedly, because the classmate is the son of the Immortal Chosen, he was summoned to the world of cultivation as a companion. His classmates are part of a cheating army, and only the male protagonist has the talent to be an alchemist that anyone can do. This is the story of an ordinary person becoming strong from cowardice, and from weak to powerful.

When humans ruled 80% of the Milky Way with iron and blood, the alien demons came. The mechas that humans pride themselves on being able to annihilate stars are vulnerable to demons. Just when the entire galaxy is about to fall into the hands of extraterrestrial demons, an ordinary mecha pilot returns to ten years before the invasion of extraterrestrial demons. This time, no regrets!