Tsukuyomi: Moon Phase, Vampire Knight Recommendations
Both contain vampires, enough said. The art in these to animes is absolutly georgous. Good plots, secret loves, full Moons, and sexy vampires, are what makes these two animes so similar. Very unique.
They both have vampires and dark, dramatic story lines full of vampire romance goodness and slight hints of action and comedy. The main female character is a young "innocent" girl who have strong bonds to the leading guy. Beautiful, sometimes gothic sceneries. What's not to like?