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.

When Keitaro has to take care of Seta's adopted daughter, Sara, Naru of course finds out about Seta. Keitaro begins to give up his hope of Naru ever liking him and decides to help her be happy instead.