A.B.C-Z brings a single for the first time in ten months. This edition comes with a bonus DVD featuring a music video of "Bounenkai BOU! NEN! KAI," its making-of, and special content for this edition (40 min., approx.). Also includes a 16-page special booklet (BU! REI! KOU! ver.) and an application cord (valid only in Japan). A part of included tracks are different from other editions'.