A growing popular add to a BluRay collection seems to be additional audio drama programmes. With the popular Japanese animation Tiger & Bunny there’s a brand new radio drama with the whole cast.
Crunchy roll has all the details:
The Japanese Tiger & Bunny Bluray Box will include all 25 episodes of the original TV series on 12 Bluray discs. In addition to the bonus materials included in the 9 individual Tiger & Bunny Bluray releases, the new box set will also include an original audio drama CD and new interviews with the voice cast.