My Husband is a Vampire?!

Fauna, a 20 year old female decides to go inside a forest with her friend, Kyoko. She then notices Kyoko had gone missing, probably due to how pitch black it is. But then, there was an eerie looking castle in front of her. She decides to go in, as seven boys try charm, act silly, and even persuade her.
What will Fauna do once she finds out that she is half vampire and half succubus?