A hero saves a world, gets screwed over by the people he saved, comes back as a depressed teenager, and then gets pulled back in anyway. The setup alone is the joke. It's not about becoming stronger or saving the world again, it's about a guy who already knows how this ends, already hates it, and has to do it all over while actually being funny about his own powerlessness. The second time around he's not a hero anymore. He's just exhausted, which is exactly when adventure stops being escapism and becomes comedy.
Keiji saved an entire world once before. He defeated monsters, toppled evil, and became a legendary hero. Then everything went wrong. Trapped and stripped of his power, he got yanked back to Earth and reborn as a baby with all his memories intact, forced to live a normal life as an introverted high school student. Except normal doesn't last long. The world that summoned him once pulls him back again, and this time he's ready for anything. Keiji arrives as a full-grown adult with a decade of preparation, modern knowledge, and zero patience for the nonsense that plagued him before. His second chance means doing things differently: smarter alliances, fewer heroic sacrifices, and way more sarcasm. What unfolds is part adventure fantasy and part comedy of errors. Keiji's deadpan experience clashes hilariously against a world that expects wonder and amazement. He's tired, cynical, and absolutely done with typical hero narratives. But somehow, his jaded approach to saving the world again might be exactly what this realm needs.