Sakamakis x Reader: Into the Night

After being kidnapped, you are brought to a castle. Inside the castle live six vampires of the Sakamaki family; Ayato, Laito, Kanato, Reiji, Shu, and Subaru.
You find out later that one of them wanted to bring you here because you were "selected" for a particular event.
What that particular event is, you have no clue whatsoever. And your only choice is to remain here until you fulfill your role.
In the Sakamaki residence, all six boys have mysterious pasts unknown to you. They all hold heart-wrenching stories of how they became who they were.
Though they can be rather possessive and sometimes unfeeling, they value you in some way.
Some of them are related, but they define their relationship through friendship, not by blood. Over time, they open up and tell you about their pasts.
But all of them are striving to attain one thing: you.

(Undergoing massive amounts of editing)
DISCLAIMER: This is a Diabolik Lovers x Reader Fanfic. I don't own Diabolik Lovers.