Manga Yamada-kun to Shichinin no Majo will be releasing an OVA adaption to celebrate one million views of Yamada-kun to 7-nin no Majo. More details will come shortly in the 33rd issue of Weekly Shounen Magazine.
I kinda figured Miki Yoshikawa's cryptic tweet was hinting towards an anime adaption of some sorts, after a million views were received from the PV. I'm just a little disappointed that it's an OVA and not a full–fledged series.
AnimeShinbun is a community of awesome people posting and discussing the latest anime news. It’s part of NewsBoiler, a network of social news sites covering today’s pop culture.