Blood alone manga

Blood Alone summary:

Misaki is perhaps the most innocent and most sincere young lady there ever was. It’s almost inconceivable that she could be a vampire. With her powers as a vampire, she could easily entice any human to do her bidding but she chooses not to. Especially when it comes to Kuroe, a young author who has a deep running past with vampires, and the man she is in love with. Note: Adapted from a set of Doujinshi by the same mangaka. Many of the story arcs in the manga are based partially or wholly upon the doujinshi.