Majutsu Tantei: Tokisaki Kurumi no Jikenbo

Kurumi Tokisaki is a college student and a detective specializing in crimes involving magical artifacts. A "magic bullet" that can snipe impossible targets. A "living doll" that induces mass coma. Faced with supernatural cases that cannot be solved by common sense, Kurumi's deductive skills will be put in a race against time!

(Source: Fantasia Bunko, translated)