Nanako runs through tough training exercises, such as standing under a cold waterfall with nothing but a bikini on, with the help of Genki. Nanako, however, believes she is on vacation. While standing by the fire at night, Nanako cooks fishes. However, when she gives Dr. Ogami one, he gets angry because she forgot to buy daikon radish, which helps the protein in fish digest properly. Nanako gets frustrated, and runs away.

While in the woods, she encounters a giant bear after trying to light a fire, and Dr. Ogami reminisces about past Nanakos in the trailer. Nanako runs from the bear in fear as it chases her. Dr. Ogami realizes she is missing and then begins to read a signal coming from a stuffed animal he had given to her. He locates her and saves her from plunging off a cliff. Genki stops the bear from mauling her to death. Nanako, while hanging from Dr. Ogami's hand, which has a hold of her foot, begs for forgiveness, but Dr. Ogami drops her into the river below as punishment. However, Nanako catches a cold and relaxes naked in a hot tub above a fire Kuron built. Dr. Ogami appears with the stuffed animal that had thought by Nanako to have been dropped off the cliff when she was rescued, but, not only is it a tracking device, it is also a recorder. It plays back something Nanako had said about Dr. Ogami behind his back. Dr. Ogami gets angry and Nanako freaks, jumping out of the tub naked and running for her life. Dr. Ogami chases after her with a beating stick experiment.

Nanako and Dr. Ogami float to safety, and so begins the operation. They strip Nanako down and tie her up to begin the procedure. Dr. Ogami participates, but is really there to sabotage the entire experiment (not to mention cure Nanako). Before putting her under, Dr. Ogami tells Nanako that he called the Army to rescue them.

After the first step in the experiment is completed, the Army and Air Force arrives to destroy the area, and the experiment is a complete failure. Another monster goes berzerk and starts killing people left and right, including the head of the experiment, Griffin. Saint, however, escapes with the information about the experiment, hoping to sell it to the highest bidder. Dr. Ogami and Nanako escape into a river and wind up near a waterfall. Dr. Ogami dreams of the past Nanako and himself falling in love, and the past Nanako encourages him. Nanako and Dr. Ogami are eventually saved by the rest of the gang.

However, after returning to the base, it is revealed that Dr. Ogami was to be assigned to SkyLab 5, the newest orbital space station. Realizing that the assignment was really a means to hide him, Dr. Ogami refuses, stating that he will not work anywhere that doesn't have fish. After the Army offers to send up as much fish as he wants, Dr. Ogami adds that he prefers grated radish on his fish. After the Army agreed to this request, Dr. Ogami finally stipulated that only one person is allowed to grill the fish and grate the radish... Nanako! When she realized what Dr. Ogami meant, Nanako groaned in discouragement.