The story is well written, a nice flashback on high school life of the two main characters of the show, the only thing that's sad is that we didn't get more episodes out of this, as it could easily be a story on its own.
When it comes to OVA's I really don't like them as most of the time they don't really give you anything important to the story, but this one just blew my mind.
Expecting just some random side story, I got to experience when the main characters were in high school and had their first contacts.
All in all worth watching even if you didn't watch the show. It will spoil a few things just a warning.
