Shinomiya Kyouya is forced to become a new member of the GJ, an unidentified club that duels in a room of the former building of a certain school. Here he meets the club leader, Mao, a short girl with a big attitude; Mao's younger sister, Megumi, who has the heart of a bipolar angel; the recognized genius with a lack of common sense, Shion; and the always-hungry and mysterious Kirara. Time flies with these unique girls around.

Special volume that details Kyouya's year as GJ-Club president. Also has some chapters detailing the little sisters after their middle school graduation.

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