Amano Akari was looking for the vampire's mansion in the woods because people say that there is a young girl there who hasn't aged, but she gets lost. She's saved by a young girl, Sophie, who turns out to be the vampire she's looking for!

This 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.