In addition to the anime, they contained some seiyuu talk video clips
called "Himitsu no Kaigishitsu" (秘密の会議室).
This was a talk by the six main seiyuu,
Hatano Wataru, Noto Mamiko (能登麻美子), Gotou Mai, Shimizu Kaori, Ueda Kana (植田佳奈), Satou Rina (佐藤利奈)
and it continued from the first DVD to the last DVD.
