Fantasy wa Shiranai keredo, Naniyara Kikakugai Mitai desu

Due to a mistake by a goddess, the overly kindhearted office worker Fuyuya Satori meets an untimely end. As an apology, he's granted an appraisal-type skill and reborn in another world as a ten-year-old boy named Toya. But with almost zero knowledge of fantasy worlds, Toya's second life seems off to a shaky start... Yet his gentle, polite nature soon draws the attention of skilled adventurers, merchants, and guild members alike. What's more, the skill he received as an apology turns out to be an infinitely evolving, overpowered gift!