Gyaru to Nekura no Kyuuketsu Kankei

Hadekawa Iyone failed her high school debut as a wannabe gal. Desperately trying to break out from her outcast status, she tries talking to the girl sitting next to her, Chisui Makuru, who turns out to be the vampire rumored about town! Although Makuru isn't like your typical vampire... And 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: NicoNico Seiga, translated)