At the motel on the coast of Kohe, two lovers, Shinichi Shimizu (Hiroji Shimizu) and Yukiko Mori (Mori Qiuzi), Ayu (Akira Tamura) and Yoshiko Sakurai (Hiroko Sakurai) play a crazy game of wife swapping, all of which are fully viewed by the hotel manager Makagi (Kishida Mori) through the camera in the room. After seeing off friends, Shinichi and Yukiko strolled along the beach and were attacked by Makibu, but the two men in the coma experienced more fun than ever before. Soon after Kangzi became pregnant, she hoped to marry Ah Yu, but her boyfriend, who was addicted to the left-wing student movement, showed no interest in marriage. While Shinichi and Yukiko, who had doubts in their hearts, visited the motel again, Makaki brought them into a strange utopian society hidden in the forest.