Also known as: ハルチカ, ハルチカシリーズ, 〜ハルタとチカは青春する〜
Haruchika is a Japanese mystery novel series by Hatsuno Sei. The first volume was published by Kadokawa Shoten in 2008 with cover illustration by Tanji Youko. Starting from June, 2013, the series is republished again by Kadokawa Bunko and illustrated by Yamanaka Hico. Four novels have been released as of 2015, with a fifth planned. An anime television series adaptation by P.A.Works aired in 2016, with two sequel Drama CDs coming out later that year. A Live-action movie premiered in Spring 2017.