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.