Ruri Dragon Vol.1 (Jump Comics)

One morning, Ruri Aoki, a high school student, wakes up to find that she has suddenly grown horns on her head! Her mother told her that she might have inherited it because her father is a dragon. Ruri's mother tells her that she might have inherited it from her father, but she is puzzled and goes to school anyway.... Her classmates are curious about the unfamiliar horn, and another dragon constitution is revealed! A slight change in the usual routine.... The daily life of Dragon Girl Ruri starts slowly!

Note: This is in japanese language