Diabolik Lovers II: More Blood

Even shorter episodes this time round (down by about two minutes), Diabolik Lovers II: More Blood brings back main character Yui with the ever-fighting Sakamaki vampire brothers. But now Yui is more a family member this time round - no not a vampire - as she's grown accustomed to their habit of just appearing next to her whenever they want blood, and the fact that they ever so slightly treat her more like a human than prey. The story isn't about that though, as now the brothers and Yui must deal with a new threat in the form of a new set of vampire brothers.

The new plot consists of the story of Adam and Eve, with Eve supposedly being Yui. This is according to the new vampires who are introduced in the first episode, which we come to know are not pureblood vampires. As you get to know them, you see that their personalities remind you of some of the Sakamaki brothers: the second brother (quiet but strict), the fourth brother (flirty but evil brother who likes to give Yui nicknames), fifth brother (the supposedly cute brother out of them all but is actually creepy) and the sixth brother (the hot headed one who hates everything/one), collectively known as the Mukami brothers. They've now taken Yui away for their plan, consisting of the need to find Adam.

Featuring backstories, Yui is once again forced to be a living blood source for the brothers, which kind of gives you a replay of the first Diabolik Lovers in terms of learning more about each of them whilst a plan is slowly unravelling. They did say that they wouldn't take her blood like the Sakamaki brothers did, but they seem to contradict that, and are even worse by drinking her blood to the extent that Yui faints. Anyway, the more the Mukami brothers show up and seem interesting, you do feel like wanting to see the Sakamaki brothers, who don't really show up much after the first episode.

But the unravelling of the mystery behind the reason why they need Yui is delivered differently too: whenever she sleeps, Yui keeps on finding herself by this tree with some clockwork thing rotating around it. The Awakening is much slower this time, and the person behind the plan does not show up until later. Nevertheless, it is the mystery that brings you back to the anime.

So Yui is once again a partial Damsel in Distress with a new set of vampire brothers who need her for their plan. The absence of the original vampire brothers is missed as the Mukami brothers take their spotlight and treat Yui worse than they did (totally contradicting what they said in the beginning) and want her to Awaken so their Adam and Eve plan can go ahead. For now there are only 5 episodes out, but if it's anything like the first Diabolik Lovers, it will surely get your attention.
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Summary

Main character Yui is now taken in by a new set of vampire brothers, who wish to use her as part of their plan
Anything else?: You do miss the Sakamaki brothers when they're not around (only some of them)