15-year-old Ranze Eto lives in an isolated castle in Japan with her werewolf mother, vampire father, and younger brother, Rinze.

Her parents are overjoyed, but Ranze's new powers make it difficult to continue living life as a normal teenage girl.

On Ranze's first day at her new school in junior high, she meets and falls in love with the brash yet handsome young athlete, Shun Makabe.

On top of this, she also has a bitter rival in the pretty but spiteful Yoko Kamiya (the daughter of a yakuza boss) who also likes Shun and doesn't take kindly to Ranze's intruding on her turf.

[43][44] There are several additional stories set in the Tokimeki Tonight universe that have been collected in the following volumes: Additional books released about the series include: A 34-episode anime television series adaptation, directed by Hiroshi Sasagawa and produced by Group TAC and Toho, aired in Japan between October 7, 1982, and September 22, 1983, on Nippon TV.

In the final episode it's revealed Shun has a star-shaped birthmark that proves he is the long lost prince of the Demon World.