 In the R2 DVD release, each episode has extended footage at the middle of every episode, where a short (2 minutes) sketch featuring some or all of the characters is presented.The manga version, illustrated by Hamao Sumeragi and based on the videogame version, began serialization in the Comp Ace on January 26, 2006 in Japan, published by Kadokawa Shoten.The manga was collected in two tankōbon volumes.