An audio CD, titled Tatoeba Konna Birthday Song (たとえばこんなバースデーソング, subtitled with "Birthday Song for you"), was released with a special edition of Volume 3 on November 18, 2011. The drama CD contains a character song, performed by Yukino Yukinoshita and Yui Yuigahama (Saori Hayami and Nao Tōyama), titled "Bright Generation" and composed by Yukari Hashimoto.
A transcribed (written) version is included as a bonus chapter in Volume 3 English editions and some Japanese reprint editions.
The CD details a larger birthday party held for Yui. It involves the Service Club, Totsuka, Komachi, and Zaimokuza going to karaoke.