Tokimeki Tonight (ときめきトゥナイト, Tokimeki Tunaito) is a manga series by Koi Ikeno which ran in the Japanese manga magazine Ribon from July 1982 through October 1994. ("Tokimeki" is Japanese for "exciting.") A TV anime series, directed by Speed Racer's Hiroshi Sasagawa, was adapted from the manga and was broadcast on NTV from October 7, 1982 through September 22, 1983.
Ranze Eto (her given name is also Romanized as "Ransie" or "Ranzi" in some non-Japanese versions) may look like your average Japanese teenage girl, but in reality she lives in an extraordinary situation. Her mother is a werewolf, and her father is a vampire. Ranze has special powers of her own: for example, whenever she bites anything, she can change herself into a carbon copy of that object, whether it's another person or an inanimate object such as a piece of bread. Only by sneezing can she return to her normal self.