Spring, a Date, and Playing a Little Sister

Spring, a Date, and Playing a Little Sister (春とデートと妹ごっこ) is a Drama CD released on January 6, 2012. The story takes place between the events of Pentagon++ and Nise Random. This Drama CD marks the debut of Uwa Chihiro and Enjouji Shino's voice actors.

Summary
On an otherwise normal day, the five original members of the Student Cultural Society come across a bizarre note. Written on the note are the names of the second year members and "Fulfill the wishes of Enjouji and Chihiro." The second years immediately suspect it to be another message from Heartseed or No.2. As a result, the original five members decide to ask Enjouji and Chihiro if they need anything, doing their best to grant any wishes they have.

Cast

 * Mizushima, Takahiro as Yaegashi Taichi
 * Toyosaki, Aki as Nagase Iori
 * Sawashiro, Miyuki as Inaba Himeko
 * Kanemoto, Hisako as  Kiriyama Yui
 * Terashima, Takuma as Aoki Yoshifumi
 * Tōyama, Nao as Enjouji Shino
 * Toyonaga, Toshiyuki as Uwa Chihiro