Shinso ga Baka Nara Kenzoku mo.

Mina Hanegawa, a 20-year-old freelancer, is taken by a friend to a nightclub, where she meets Kurisu Tsuchiura, a suspicious-looking man who claims to be a vampire.
Mina is struck by the arrogant and irreverent behavior of this self-proclaimed vampire. However, this encounter quickly changes Mina's monotonous life...