High school student Li Chih-hui worships martial arts movie star “Long” and dreams of becoming a kung fu master so he can defend himself from bullies. When classmate Chien Li-hua shows concern for the bullied Chih-hui, he begins to develop feelings for her. And when he finds out Li-hua is into divination and wants to become a spirit medium, Chih-hui pens a script entitled “Long and the Magic Princess” and invites her to star in it, but the bullies show up and knock Chih-hui unconscious. When he wakes up, however, Chih-hui suddenly declares that Long’s spirit now possesses his body.
Middle-aged A-San, who has been single for many years, finally feels his heart beating again. But he is hesitant in taking action and asking out Yu-lian. His best friend is someone who has always been on his side and has never abandoned him, but can’t take his celibacy anymore. This friend is his penis. His soft, flaccid penis turns into a human. He swears to God that he will turn his loser life around and get laid. So A-San and his penis duke it out for control of sense and sensibility.
Demons and humans share a planet near Earth. The humans occupy the planet by day and the demons occupy it at night. They live in harmony until some of the demons scheme against the humans. The Guardians rid the planet of the troublesome demonic creatures to preserve the peace.