AKB48 brings the 55th single. The title song is performed by selected 22 members and Rino Sashihara performes in the center. B-side track is a song to commemorate the graduation of Rino Sashihara. Each type includes an exclusive third track ("Shitsuzensei" by IZ4648). Comes with a bonus DVD featuring music videos of the first and the second tracks (subject to change). Limited edition comes with an event ticket or an application card (both valid only in Japan).