I find this OVA to be quite underrated, along with the entire series. The characters are extremely likable, and even within a single episode the story manages to get you emotionally invested, while at the same time being ridiculous to the point of parody of the genre. This story "doesn't care", and this is what makes the entire Twin Angel series so great. By shaving away needless exposition, explanations, and reason in general, you're left with a quickly progressing and extremely fun to watch story with some twists and turns that will keep you invested. If you're a fan of mahou shoujo and like "fun"anime, this is exactly the kind of thing you're looking for.