Haganai (はがない), short for Boku wa Tomodachi ga Sukunai (僕は友達が少ない; loosely "I Don't Have Many Friends"), is a Japanese light novel series written by Yomi Hirasaka, illustrated by Buriki, and published by Media Factory, with 11 volumes released from August 2009 to August 2015. It has been given several manga adaptations; the first incarnation, its title and basic plot unchanged, began serialization in 2010; it was written and illustrated by Itachi and published in Monthly Comic Alive. A retelling of the series, written by Misaki Harukawa and illustrated by Shuichi Taguchi and called Boku wa Tomodachi ga Sukunai+ was published in Jump SQ.19. A 12-episode anime adaptation by AIC Build aired in Japan between October and December 2011. An original video animation episode was released in September 2012. A second anime season, Haganai NEXT, aired between January and March 2013. A live-action film adaptation was released in February 2014.

Kodaka Hasegawa, a transfer student to St. Chronica's Academy, has found it difficult to make friends because of his mix of brown-blond hair (inherited from his deceased English mother) and fierce-looking eyes that make him look like a delinquent. One day, he accidentally comes across the equally solitary and very abrasive Yozora Mikazuki as she converses with "Tomo", her "air" (imaginary) friend. Realizing that they lack social lives and skills, they decide that the best way to improve their situation is to form the Neighbors Club (隣人部, Rinjin-bu), "an after-school club for people with no friends like themselves". Other students with various backgrounds join the club: Sena Kashiwazaki is an attractive but arrogant idol who has no female friends and treats the boys as her slaves; Yukimura Kusunoki is an effeminate underclassman who idolizes Kodaka and strives to become manly like him; Rika Shiguma is a genius scientist with a perverted mind; Kobato Hasegawa is Kodaka's little sister who generally cosplays as a vampire; and Maria Takayama, a ten-year-old foul-mouthed nun who serves as the club's advisor. The story follows their adventures as the club tries out various school and outside social activities as practice for making friends.