The girls discover that Keitaro is not really a Tokyo University student and to make things worse, his studies don't seem to be going very well. Seeing this, Keitaro decides it's time to leave Hinata Inn.

A thief has stolen the rent money of Hinata Inn and everyone panics. That is everyone except Detective Kitsune and her sidekick Kaolla Su. The cast begins to assemble the clues and attempt to solve the mystery of the missing rent money.