Mukiryoku Tantei Mendona Jiken, Okotowari (Fan Bunko)

[Machine Translation] Second-year high school student Chizuru Kirishima is a genius who can solve any problem, but his biggest flaw is that he is ultimately apathetic. He has to think about his career path soon and wonders if there is a job where he can earn money with his brain alone and without using any labor. He spends his days wondering if there is a job where he can make money using only his brain and not his labor. He is faced with a series of cases brought to him by a failed detective who was removed from a field investigation for failure, as well as by his classmates, Yuzuki and Yohba, who have been working with him for years. He tries to solve the mystery of a dying message, a kidnapping, an accident in an escape game, and more...? Eventually, his hidden past comes to light.

高2の霧島智鶴はどんな難題も解決できる天才だが、最大の欠点は究極に無気力なこと。そろそろ進路も考えねばならず、労力を使わず頭脳だけで稼げる仕事はないか?と考える日々。そんな彼のもとに、失敗で現場捜査を外された落ちこぼれ刑事や同級生の揚羽、柚季らが次々と事件を持ち込む。ダイイングメッセージの謎、誘拐、脱出ゲームでの事故などに挑み...?やがて彼の隠された過去が明らかになり―。