Haruchika is a Japanese light novel series by Sei Hatsuno. The first novel in the series was published by Kadokawa Shoten on October 29, 2008 in a tankōbon format; five volumes have been published in this format as of September 30, 2015. Kadokawa Shoten has also released the series in bunkobon format starting on July 24, 2010 featuring cover illustrations by Yoko Tanji for the first three volumes, and Hiko Yamanaka for the subsequent volumes. mes.
A manga adaptation illustrated by Būta, with character designs by Namaniku ATK, began serialization in Kadokawa Shoten's Monthly Shōnen Ace with the December 2015 issue.
| Exit Game|
|July 24, 2010||ISBN 9784043943715|
| First Love Sommelier|
|July 23, 2011||ISBN 978-4-04-394455-2|
| Imaginary Organ|
|July 25, 2012||ISBN 9784041003794|
| One Thousand Years Juliet|
|November 22, 2013||ISBN 9784041010808|
| Planet Charon|
|September 30, 2015||ISBN 978-4-04-110476-7|
| Extra Edition|
|February 25, 2017||ISBN 978-4041040003|