This is more of the same from the original Hanaukyou series. You need to have watched the former for this OVA to make any sense. Now given that you have watched the Hanaukyou series, this is literally a continuation; with the one change being a more personal flavor to the episodes. If you liked the original, then you might as well add on this additional 45min run.
Looks just like the main series. Lots of ecchi, somewhat cheap animation, and did I mention the ecchi?
The OP is the same as the main series, but they added a new ED, which is barely more enticing to listen
to than the original ED. Same BGM and same VA cast.
So you can pretty much tell what each ep is from the title. You get one episode explaining the Cynthia/Grace split personality, one episode giving more background to Konoe (with lots of ecchi), and one episode with Tarou being forced to cross-dress as a maid by Ikuyo. These are a nice addition to give a bit of additional background/humor, but don't really contribute anything meaningful as there was never any plot to begin with.
As mentioned above, you get some new background information and additional interactions showing Tarou in his most pitiful state yet.
It's 45 minutes of new content, mostly of the ecchi type. As I mentioned in the main review, I literally did not even know when the OVA started as my eps were numbered 1-15. Watch only if you liked the original.