Look, this is something, that you'll watch if you're a fan of the show, but should basically steer away from in any other case. We have a story about Maki being in a dream with everyone. Subtle, I know. Anyway, she admits, that she loved everyone else, even from before they turned idols, big whoop. This is a really materielistic OVA. What you'll get: a new music video, Maki in loli form and the characters interacting. You won't miss out on anything, if you just leave this one be, but it's not offensively bad, or anything. It's just a vaste of an OVA. But sincethe series has an abundance of those, I'm not really heartbroken. This was the first I saw though, so that's kind of lame, but that is really the worst I can say about it.
In the future, please just release the music video and leave out all the rest.