User blog comment:B214/Season 3 confirmed!!!!!!/@comment-95.90.245.200-20150112013214/@comment-16281343-20150112062224

OVAs are episodes written by Ishibumi for the anime. In Season 1 the OVAs are the episodes 13 and 14. There will be an OVA for Season 2 w/c will be released on March 10.

Specials are the 3-5 minute episodes.