All I'm seeing is scathing reviews. Especially the first episode which people think is absolutely stupid. Just to let people know that particular episode is adapted from the actual visual novel. Dang. It's a fan service OVA. Just watch it for what it is. There really isn't any story left to be made. If they tried it'd probably be far worse than this. The characters are back and are just as lovable. Honestly I'm glad that after 10 years they made anything at all. If you're a fan then I hope you will enjoy it. I'm a fan and I found this OVA to be absolutely hilarious and adorable.
As a side note the previews for the last OVA file look to be more serious and explore Rika's past with Hanyu.