Seiya treats a video game world like a doctoral thesis, and the show mines genuine comedy gold from watching an overpowered hero refuse to move forward until he's purchased backup equipment for his backup equipment. The goddess summoning him gets progressively more unhinged trying to convince him that yes, the slimes are actually weak. It's isekai satire that doesn't waste time explaining the joke, it just lets Seiya's paranoia and the goddess's exasperation carry the entire thing, and somehow that friction never gets old across twelve episodes.

Rista, a young goddess, summons a hero to save Gaeabrande, an S-ranked world facing destruction. What she gets is Seiya Ryuuguuin: a warrior with remarkable stats and exceptional ability in every way. There's just one problem. Seiya treats every single encounter like it could be his last, approaching a basic slime with his strongest skills. He buys three sets of armor, stockpiles potions and supplies, and refuses to set foot in Gaeabrande until he has trained to a higher level. He even declines the food Rista cooks for him in case she is trying to poison him. What unfolds is a fantasy adventure comedy of contrasts: a world where evil holds the upper hand, paired with a hero whose excessive caution might turn out to be exactly what saves it.