K-ON!! Character Image Songs: Tsumugi Kotobuki is the fourth volume of the second season's "Character Image Songs", featuring Tsumugi Kotobuki. The album contains the songs Diary wa Fortissimo, Yasei no Jounetsu and Tsumugi's version of Come with Me!!, as well as their respective instrumental versions. The songs are sung by Tsumugi's voice actress Minako Kotobuki. The album was released on 17 November 2010 alongside Ritsu Tainaka's and Azusa Nakano's respective versions.