Boku wa Tomodachi ga Sukunai Shobo-n! is a spin-off comic series written by Kazehana Chiruwo and illustrated by Shirabi. It's a collection of oneshots focusing on the members of the Neighbor's Club and their relationships with each other.
Break Shot by Maekawa Takeshi(Shounen, Sports, 11 volumes, 91 chapters)
by Shou Tajima(Comedy, Romance, Slice of Life, 4 volumes, 22 chapters)
Bungaku Shoujo to Shi ni Tagari no Douke[C]
by Mizuki Nomura, Rito Kousaka, Miho Takeoka(Comedy, Drama, Mystery, Psychological, Romance, School Life, Shounen, Supernatural, Tragedy, 3 volumes, 24 chapters)
aka: Bungaku Shoujo to Shinitagari no Pierrot, Book Girl and the Suicidal Mime
by Ei Itou(Comedy, Ecchi, Gender Bender, Romance, Seinen, 1 volumes, 7 chapters)
aka: Bra-con!?, Brocon!?
by Kyoko Mizuki, Yumiko Igarashi(Drama, Historical, Romance, Shoujo, Slice of Life, Tragedy, 10 volumes, 10 chapters)
Castle Of Dawn[C]
by Osamu Tezuka(Action, Drama, Historical, Romance, Seinen, Tragedy, 1 volumes, 6 chapters)
aka: Yoake Shiro
by Maya Yamada(Comedy, Ecchi, Romance, School Life, Shounen, Slice of Life, 2 volumes, 11 chapters)
aka: Katapira Operetta
Chinatsu no Uta[C]
by Shou Kitagawa(Drama, Psychological, Seinen, Slice of Life, 3 volumes, 31 chapters)