It was announced by publisher Kadokawa that the limited edition volume 9 of light novel "Yuusha ni Narenakatta Ore wa Shibushibu Shushoku wo Ketsui Shimashita.
" will have a Blu-ray OAD bundled. It will be the unaired episode 13 of the TV anime series
which will start airing this October and is adapted from the novel. The light novel is scheduled to be released in early March 2014.
Previous related thread: Light Novel 'Yusha ni Narenakatta Ore wa Shibushibu Shushoku wo Ketsui Shimashita.' To Be Animated
Yuusha ni Narenakatta Ore wa Shibushibu Shuushoku wo Ketsui Shimashita. OVA