The light novel series written by Yomi Hirasaka and illustrated by Buriki, which the TV show is based on, was first published in Japan.
The first season of the Haganai anime television series aired in Japan, introducing the story of the Neighbors' Club.
The second season of the Haganai anime, titled Haganai NEXT, aired continuing the story with new episodes.
Original video animation episodes related to Haganai were released, expanding on side stories and additional content for fans.