A swimsuit thief strikes! But when Rintaro searches for the culprit, he accidentally accuses a legendary dragon: the Dragon of Severe Waves Ren--who is also the Dragon of Storming Jade Rino's older sister! While conducting her own investigation, Keiko is attacked by a mysterious black beast! Now there's a black shadow enveloping the school...! Oh boy, the culprit this time around is seriously tough. This looks like a job for Furuhata...er, that is, Rintaro Tachibana.

The school of Black Mist and Dark Skies have suddenly shown up at Nangokuren and a four on four fight is declared! Will Rintaro and the Dragons of Nangokuren make it out on top...?

If Rintaro falls prey to eye candy, he could die. So it's just his luck that Mell, his new arcade buddy, happens to be the heavenly ruling tiger, one of the few girls who can hold her own against the dragons. But when the dragon of storming jade, Rino, appears with her own agenda, it seems that she and Mell harbor a deep dark past--and now Rintaro's at the center of it...! It's a girl-ridden panic with no sign of escape!

Who will be on top? The second semester's begun for Rintaro, who soon discovers a dragon statue in his locker, and anyone who possesses it will rule the school! Caught in the middle of the battle between the dangerous girls of Nangokuren High School, Rintaro can't forget the most important thing--to him, their knockout bodies are literally lethal!