According to Kadokawa Shoten, an OVA of Ebiten
was announced to be released in December. An anime Blu-ray will be bundled with the fourth volume of the original manga.
Ebiten anime official website
The main series of Ebiten will be streamed on Niconico Live from July.
Ebiten: Kouritsu Ebi Sugawa Koukou Tenmonbu OVA