A special volume called No.6 beyond, which features stories from the lives of the characters before or after the main story, was published on November 22, 2012.
Sebuah volume spesial berjudul No. 6 beyond yang menceritakan kehidupan karakter-karakter No. 6 sebelum atau sesudah cerita utama diterbitkan pada tanggal 22 November 2012.