According to the official blog of anime singer marble
, the announcement of the new anime of Hidamari Sketch
at Cho Hidamatsuri was confirmed. It will feature the graduation of Sae and Hiro. It's been unknown whether the new anime will be a special or a series.
Source: marble's official blog
Story by Nidhoeggr
Hidamari Sketch: Sae Hiro Sotsugyou-hen