While with U-Project, they released the singles "Japanication" and "Kanjō Discord" before signing a major record deal with Sony Music in 2010.

Their major debut single, "Liar," was released on August 11 and was used as the theme song for the drama Hammer Session!.

[14] The single "Wendy: It's You" was used as the theme song for the drama Koi Suru Hae Onna, which started airing in November.

[15] On December 18, the band successfully held their first live concert at the Nippon Budokan, performing a total of 21 songs including their latest singles.

On September 23, it was released by JPU Records in Europe, where the CD only version included three bonus tracks: "Last Moment," "Samurai Heart (Some Like It Hot!!)"

!, "I'm a Believer",[20] and a year later, their single "Rage of Dust" was used as the opening song of the second season of Mobile Suit Gundam: Iron-Blooded Orphans.