Gain作品一覧 [1st mini] step 2／4 [1st single] Bad Temper [2nd mini] Talk About S. [2nd single] Nostalgia [Gain duet] Romantic Spring [3rd mini] Truth or Dare [3rd single] A Tempo [4th mini] Hawwah [4th single] When The Twelve O’clock [1st full] End Again