The characters from both Haganai and Seitokai no Ichizon visit each others' clubroom in this two-part crossover. Strangely enough, the male protagonists from each manga do not make appearances.
The Neighbor's Club gets a mysterious message from a certain student council! This chapter was drawn by Itachi, the artist of the Haganai manga.
The Hekiyou Gakuen student council receives an invitation from the Neighbor's Club to visit. This chapter was drawn by 10mo, the artist of the Seitokai no Ichizon manga.