Haruchika (ハルチカ?), also called Haruta & Chika, is a Japanese mystery novel series by Sei Hatsuno. Kadokawa Shoten has published five novels since October 2008. A manga adaptation published by Kadokawa Shoten in Monthly Shōnen Ace began serialization in December 2015. An anime television series adaptation titled Haruchika: Haruta & Chika by P.A.Works premiered on January 7, 2016.