In Spring 2013, after graduating high school, the band members began devoting their time fully to the band, releasing their debut album Shishamo in November. On December 6, 2013, the band held their first solo concert at the Shibuya WWW in Tokyo. After performing their second national tour "Kanojo ga Dekita Bandman ni Koi Suru Kyūjitsu" in May, the band performed at nine summer festivals across Japan, and released the single "Kimi to NatsuFes".
