korean:

• 2007
  • ☐ 고백하기 좋은 날
  • ☐ 혜성
• 2008
  • ☐ someday
• 2009
  • ☐ peace, love & ice cream
  • ☐ growing season
• 2010
  • ☐ lost in love
• 2012
  • ☑ supersonic
• 2013
  • ☑ just listen
  • ☑ subsonic
• 2017
  • ☐ rescue
• 2018
  • ☐ 느린 우체통
• 2019
  • ☐ stable mindset
• 2020
  • ☐ unstable mindset
  • ☐ end theory
• 2024
  • ☐ growth theory
  • ☐ growth theory - final edition