Editions

  • Regular 通常盤 2010/03/14 ¥800 / TGCS-6045
    Tracklist
    1 Otona ni Naru tte Muzukashii!!! オトナになるって難しい!!! A-side
    2 Otona ni Naru tte Muzukashii!!! (Instrumental) オトナになるって難しい!!! (Instrumental)
  • Single V シングルV 2010/04/03 ¥1200 / TGBS-4984
    DVD Tracklist
    1 Otona ni Narutte Muzukashii!!! (MUSIC CLIP) オトナになるって難しい!!! (MUSIC CLIP) Music Video
    2 Making Eizou メイキング映像 Making of

Participants

4 idols participated in this single. They are listed below alongside their age at the time of release, starting from the oldest.