There is no real plot to it; Girl likes boy since childhood, but he forgot about her, and basically she's waiting all the time for him to remember without any courage to do something about it.
The thing that really irritated me was that even though it only has 3 episodes, it tries to throw a whole bunch of side characters in your face. The first 2 episodes mainly consist of the MC getting to know a bunch of different girls, which have absolutely no impact on the story itself. For a short OVA series, that felt pretty useless. You might as well just watch the last episode.
This also makes the romance itself look pretty shallow, even for such a short series, as there is neither development nor much backstory for the main characters.
