The second semester has started. Eriko causes trouble when she gets Rose into Ryuji's school, and Rose causes even more trouble for Ryuji during her introduction to his class. Redheaded researcher Bianca shows up to examine level 10 breaker Ryuji. The various tests exposing Ryuji's secrets catch Misaki's interest. However, something unexpected occurs during the examination.

Second semester has started. Rose causes trouble when she goes to school with Ryuji. The beautiful blonde causes a stir among Ryuji's classmates. Redheaded researcher Bianca arrives and begins exposing Ryuji's secrets.

Ryuji, Rose and the others head off to go camping on an autumn weekend when a mysterious girl suddenly appears. She is Sapphie the blue dragon, with the ability to control water. She has come to avenge Onyx, her fiancee! Ryuji and Eriko fight Sophie off, but her words cast a shadow on everyone. Things get dangerous when Rose expresses great interest in finally meeting a dragon her own age.