It's a Secret, Shirotae-sama Vol. 1

One girl must walk through a vampire academy without letting them know she’s a human. But when the head vampire discovers her secret will her days be numbered? A supernatural Girls’ Love manga featuring a human x vampire! From the creator of Cats and Sugar Bowls—also available from Seven Seas.

Utao Hananoi is a student at a prestigious academy—that’s meant for vampires! As a human, she must keep her identity a secret as humans are still considered food for the supernatural beings. But despite her best attempts, her secret is discovered by Shirotae… the progenitor of vampires! Thankfully, Shirotae offers to keep Utao’s secret, for now. Will Utao be able to keep her secret and her life or does Shirotae have other ideas in mind?