Gal to Nekura no Kyuuketsu Kankei

Iyone Hadekawa failed her high school debut as a wannabe gal. Desperately trying to break out of her outcast status, she tries talking to the girl sitting next to her, Makuru Chisui, who turns out to be the vampire rumored around town! Although Makuru isn't like your typical vampire... Thus begins the slightly strange high school life of a gal in search of a friend and a vampire in search of an underling.

(Source: Houbunsha, translated)