Hakui no Eiyuu

Kaito Tenchi is a genius scientist of rare talent. One day, he wakes up to find that he has been transported to another world. What Kaito has obtained is a rare magic called "Creation," which can create almost anything he sees once (except for plants). Kaito is rescued by Luminous, a female mercenary, and lives with her, earning money by using creation magic, and spending his days peacefully and happily, but he gets involved in various disturbances. Use your unparalleled brain and creative magic to lay waste to your enemies!

(Source: Futabasha, translated)