 The OVA episode was previewed on May 31, 2008 for an audience of four-hundred people picked via a mail-in postcard campaign.A Blu-ray Disc (BD) box set of "Clannad" was released on April 30, 2010.After the ending of the 23rd episode of the first "Clannad" anime series, a 15-second teaser trailer aired promoting a second season titled "Clannad After Story".