Yes there is going to be an ARIA OVA. I think this is awesome news and with it being an OVA the animation quality would have to be really good. Although I have no idea on what the story will be about since the TV series covered most of the chapters in the manga, though they maybe picking something out of the more recent chapters. Either way I’ll be looking forward to this.
Isn’t it going to be out later this season? I’m like 80% sure this is the case.
I actually don’t know the airing date for this as there isn’t much info out for it at the moment.