The Multiverse Voyager

A young man struggles with a deep-seated resentment toward his younger sister, whose brilliance and effortless charm seem to overshadow him at every turn. Despite his outward confidence, he feels trapped in a cycle of jealousy, unable to escape the shadow of his sibling's success. He starts to consider his weaknesses as he escapes into the anime world where heroes typically have to undergo the same battles of self-worth and rivalry. When there comes a new chance that will change his life, how will he react?