K-ON! Character Image Song Series Vol. 4: Tsumugi Kotobuki

'''K-ON! Character Image Song Series Vol. 4: Tsumugi Kotobuki''' is the fourth volume of the first season's "Character Image Song Series", featuring Tsumugi Kotobuki.

The album contains the songs Dear My Keys ~Kenban no Mahou~, Humming Bird and Tsumugi's version of Let's Go, as well as their respective instrumental versions. The songs are sung by Tsumugi's voice actress Minako Kotobuki.

The album was released on 26 August 2009 alongside Ritsu Tainaka and Azusa Nakano's respective versions.

Track Listing

 * 1) Dear My Keys ~Kenban no Mahou~
 * 2) Humming Bird
 * 3) Let's Go (Tsumugi Ver.)
 * 4) Dear My Keys ~Kenban no Mahou~ (Instrumental)
 * 5) Humming Bird (Instrumental)
 * 6) Let's Go (Instrumental)