Sakura Gakuin
was first released as the band's second song as a subgroup of Sakura Gakuin, and the fifth single overall from the album "Sakura Gakuin 2011 Nendo: Friends", from which an remix of the song, "Iine!" (Vega Mix ver.), was featured. The song was first teased in the video "Babymetal: My First Heavy Metal in Tokyo 2012" uploaded to YouTube on February 1, 2012, along with a short demo of "Ijime, Dame, Zettai".