Single release from AKB48. Type A and B includes the same 1st and 2nd tracks. Includes a bonus DVD with music clip (subject to change) and a handshake event ticket randomly selected from two kinds. Also includes a serial number card to vote for selecting members to join 22nd single (system requirements unknown). *Unless otherwise indicated, DVDs are region-2 encoded (Japan, Europe, and Middle East), and carry no subtitles.