The modern-day vampire comedy centers on high school girl Amano, who was saved from a strange incident by a vampire girl named Sophie Twilight, and has been interested in her ever since. Akari arrives at her house uninvited and the two start to live together. Although a vampire, Sophie never attacks humans, but purchases blood and anime goods via mail and lives a modern life.
Amano Akari was looking for the western style mansion in the woods becase people say that there is a doll-like young girl there whose appearance has not changed in a long time. Once in the woods however, Akari gets lost. She's saved by a young girl, Sophie, who claims that she's a vampire. However, Sophie doesn't ever attack humans, instead she lives a modern and down to earth life.
After hearing that Akari has moved in with a friend recently, her friend Hinata is concerned who that new friend is. On the way home from school, it's suddenly decided that she'll go meet Sophie at her house. She's shocked to find out that Sophie is a vampire and becomes worried if Akari's safe living together with a vampire who could suck her blood, but......
After Akari has left for school, just as Sophie is about to go to bed, she notices that Akari forgot her lunchbox and decides to bring it to her at school. There she meets Akari's friends, Sakuya and Yuu. When she is introduced as a vampire, the horror aficionado Sakuya is keen to find out more. As she is about to leave, Sophie is stopped by a girl from the class who asks her for an odd favor.