Higurashi no Na ku Koro ni Rei, also known as When they c ry 2.5, is a bonus disc released after Higurashi no Naku Koro ni Kai. It contains three arcs, known as the "Extra/Bonus Arcs." The game was released at Comiket 71, on December 31, 2006.
It was followed by 07th Expansion's next major work, When they c ry 3, more commonly known as Umineko no Naku Koro ni.
For a long time, this was the final Higurashi Sound Novel content by Ryuukishi07, before the release of Higurashi no Naku Koro ni Hō 8 years later.