Blood Alone

Enter Misaki, perhaps the most innocent and most sincere young lady there ever was. It’s almost inconceivable that she could be a vampire. And 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. This wonderful story of pure innocent love charmingly bonds Misaki to the readers. She’ll absolutely delight you with her earnest love for a human and her resolve to protect a willing mutual relationship versus turning Kuroe.
The manga is based on a set of doujinshi released by the same mangaka. Many of the story arcs in the manga are based partially or wholly upon the doujinshi.