Rihito's teacher Sakamoto — an undercover vampire hunter of notable lineage — learns that his longtime foe Ranmaru lives with the Tatsunos.

Franken proclaims his admiration for Ranmaru, who tasks him with protecting Rihito. Franken tags along with them back to the Tatsuno house for dinner.

After saving Aoi, a hungry Ranmaru tries to resist the urge to feed on her. Rihito soon arrives at the scene and comes to a mistaken realization.

Ranmaru worries he has inadvertently made Aoi interested in Rihito. Rihito chats with Aoi the next day after school, but they soon get into trouble.

A vampire works in a bathhouse in hopes of drinking the virgin blood of its heir Rihito, who worryingly falls in love on his first day of high school.