The story arcs that’ll get animated on these OVAs are Hajisarashi-hen (a short novel that was included with the limited edition of Higurashi no Naku Koro ni Matsuri), Saikoroshi-hen (the epilogue for Matsuribayashi-hen) and Hirukowashi-hen (the story arc based on Higurashi Daybreak). Here are the release dates for each of the volumes:
* Volume 1 (Hajisarashi-hen) - DVD Edition: December 26th 2008, Blu Ray Edition: January 23rd 2009
* Volume 2 (Saikoroshi-hen 1) - DVD Edition: February 25th 2008, Blu Ray Edition: March 25th 2009
* Volume 3 (Saikoroshi-hen 2) - DVD Edition: April 2009, Blu Ray Edition: May 2009
* Volume 4 (Saikoroshi-hen 3) - DVD Edition: June 2009, Blu Ray Edition: July 2009
* Volume 5 (Hirukowashi-hen) - DVD Edition: August 2009, Blu Ray Edition: September 2009