Haganai
The first "Boku wa Tomodachi ga Sukunai" manga series, written and illustrated by Itachi, has been published in Media Factory's "Monthly Comic Alive" magazine since its May 2010 issue, released on March 27, 2010. Additionally, the series has been collected in 14 "tankōbon" volumes. Seven Seas Entertainment has licensed the first manga series in North America under the title "Haganai: I Don't Have Many Friends".
Boku to Hana
"Boku to Hana" was released as a single track digital download on May 15, 2012, followed by a full-length three song CD single on May 30. The single featured two B-sides: an original composition entitled "Neptunus", and a remix of the band's single "Rookie" by Japanese DJ Takkyu Ishino of Denki Groove. "Neptunus" was written in the same lyrical world view as "Boku to Hana", as the band had done on their previous single "Bach no Senritsu o Yoru ni Kiita Sei Desu" with its B-side "Years". The band created the song instinctively, as opposed to the planned style that "Boku to Hana" was written in. The "colorful and psychedelic" song was written as a metaphor for the objects and atmosphere Yamaguchi felt in his room at home, a technique Yamaguchi had previously used on the song "Coelacanth to Boku" on "Kikuuiki" (2010). The band created the basic song arrangement while improvising in studio recording sessions. The band decided to include a remix by Ishino after considering what sort of music would be the best for the people who grew to know "Boku to Hana" because of its use as a drama theme song. Working with Ishino had been discussed with the band's staff many times, but the opportunity only really presented itself after the band met Denki Groove backstage at the Rising Sun Rock Festival in 2011. Sakanaction chose "Rookie" as the song to be remixed by Ishino, but gave Ishino free rein as to the content and style of his version.