Diabolik Lovers x OC

Aspen has lived with the Sakamaki's for as long as she can remember. She's fine being their Baby Bear, Princess and all the other nicknames. She is very used to their unique individual personalities and antics. But then she comes: Yui Komori. Her arrival sparks worry within Aspen, and she starts to wonder if the brothers really love her like they claim, going as far as to hide herself in her room just to avoid confrontation. Even if Yui is a sacrificial bride like the past visitors to the place she calls home, Aspen wonders if the girl is seen as more than just that, and often vents her worries to an ever-asleep Shu, who willingly listens. Who used to willingly listen. The others are no different, as each one of them shows their dark side whenever Aspen doesn't listen to Yui, which sends a whole lot of confusion and neglect running through her head.
Seeking condolence from the Mukami brothers, Aspen suddenly gets attention from the Sakamaki's, and none of its good. Aspen endures punishment after punishment for any little mistake, and feels as though she deserves answers, and strangely trusts the Sakamaki's illegitimate brother - a prince-like vampire who's more into his phone and selfies than anything else: Kino - to give them to her. Unknowingly having become a pet more or less to Kino, the frail girl begs for the Sakamaki's to save her, but nothing is done. Questioning everything, Aspen runs away and lands herself into a situation worse than the consequential punishments she received from the Sakamaki brothers. Upon hearing of it, will the Sakamaki's put aside their hatred and help Aspen, or will they leave her to perish?
(The cover pic isn't mine. It just looks close to the OC character I drew. I've lost the drawing though...)