St. Dragon Girl

Momoka is a fifteen year old girl with an obsession with pandas. Kou Ryuuga is her childhood friend and secret crush, beginning when he saved her stuffed panda toy from a river. Now, Momoka lives in a dojo teaching martial arts, and Kou is a summoner. What happens when Kou decides to summon a dragon to help him do a job, but the dragon possesses Momoka instead? This is a story of martial arts, love, and yokai.

St. Dragon Girl is a manga by Natsumi Matsumoto. It was serialized in Ribon magazine between 2000 and 2003.