According to the official twitter of Yasuda Suzuhito
, an OVA series of Yozakura Quartet
was announced. They "reset" the first series and will faithfully reproduce the original story of the manga so that the fans of the manga will be satisfied with the anime. The voice cast will be the same as the first series.
Title: Yozakura Quartet ~Hoshi no Umi~
Director, Character Designer & General Graphic Director: Ryo-timo
Production Studio: Tatsunoko Productions
, KMMJ Studios
The first volume will be bundled with the manga volume 9 to be released this October.
Source: Yasuda's official twitter