Momoka Sendou (nicknamed "Dragon Girl") and Ryuga Kou are childhood friends. Momoka is a martial artist, and Ryuga is a Chinese magic master who banishes demons. In order to increase his power, Ryuga calls on the spirit of a dragon to possess him, but the spirit enters Momoka instead. Now the two must unite forces and fight demons together! (Source: VIZ Media)

Sei Dragon Girl was published in English as St.♥ Dragon Girl by VIZ Media under the Shojo Beat imprint from December 2, 2008 to September 7, 2010.