A new special episode that was distributed to those who purchase all three Blu-ray box sets of Sayonara Zetsubou Sensei series on January 31, 2012.
Synonyms: Sayonara Zetsubou Sensei BD Box OVA, SZS Blu-ray Box Special
Jan 31, 2012
Season: Winter 2012
Duration: 24 minutes
External Links: MyAnimeList