Hi! Searching in my folders, I found this doujin album, and I decided share to us
This CD have only one song, who is a little medley of the two 2nd season endings of K-ON in jazz format and is arranged by 放課後ハイボール (Houkago HighBall)
The album was called "No Listen, No Thank You!", a union of "Listen!!" and "NO, Thank You" (The original names of the songs)
Enjoy the song!