Ruri Aoki, a typical high school student, faces a bizarre transformation one day when she wakes up with horns sprouting from her head. After sharing this oddity with her mother, she learns the startling truth that she is half-dragon. Despite her bewilderment, Ruri decides to carry on with her daily routine at school, only to find that her friends, classmates, and teacher quickly take notice of her newfound appendages. As the novelty of her half-dragon status spreads, Ruri grapples with the unexpected chaos and attention it brings into her life.