RuriDragon, Vol. 1 by Masaoki Shindo

[Viz] Ruri faces the usual high school issues: pushy classmates, annoying teachers, and…waking up with dragon horns?! Just after starting high school, Ruri gets hit with the biggest reveal of her life—she’s a dragon! Well, a half dragon. Her mom admits Ruri inherited her draconic traits from her father, who, yes, is actually a dragon. As if dealing with curious classmates wasn’t already challenging enough, Ruri and her dragon genes literally turn up the heat in the middle of a lecture. Her ordinary life is about to be anything but!