Manga Tensei Kenja No Isekai Raifu ~Daini No Shokugyo Wo Ete, Sekai Saikyou Ni Narimashita~

Sano Yuji, a black employee of the company, was called to another world when he finished his work at home. His profession in another world, the Monster Tamer, is considered a job that makes it difficult to become an adventurer. However, thanks to some slugs that he met after reading several magic books, he gained magical powers and a second profession-Sage.
Yuji gained overwhelming power, but is he aware of his power? Blindly becoming incomparable and the strongest in the world!