Mezase Happy 100%↑↑↑ (目指せハッピー100%↑↑↑(めざせ はっぴい 100%↑↑↑) Mezase Happy 100%↑↑↑) or Aim for Happy 100%↑↑↑ is a "Character Image Song" performed by Ritsu Tainaka, produced by Pony Canyon and published on 26 August 2009 within Ritsu's Character Image Song volume. The song was sung by Ritsu's voice actress Satomi Satō, written by Shouko Ohmori and composed and arranged by Hajime Hyakkoku.