The Deadly Seven [Vocaloid girl x girl]
She isn't in the school for long until she realizes she- Rin Kagamine- has feelings for her first friend made since transferring- the cheerful and well mannered student council president, Hatsune Miku.
But what Rin didn't realize is that this isn't Miku's first romance with a girl- in fact, Rin is her eighth girlfriend. And the other seven are still hung up.
With them now wishing to get back at Rin for getting the happiness they all want, Rin finds out her first relationship is going to be a lot harder than she anticipated.