Long time ago in ancient Japan, human beings could still see Yokai monsters and were afraid of them. However, as time passed and civilization and enlightenment progressed, people started forgetting about them... Though a son of the leader of all Yokai monsters, Mikoshi Nyudo, an adorable looking monster, Tofu Boy, has no talent in scaring the human beings. He is always scolded by his father and laughed at by his monster friends. One day, he decides to go on a journey to find out about the meaning of his life as a Yokai monster and to see his mother he's never met before.

Kyoko is a university librarian and she also helps her parents with their drycleaning company. She is involved with a childhood friend from the neighborhood, Kota. He is the son of the local tofu maker and has begun a moderately successful career as a stand-up comedian. A visiting lecturer from Tokyo falls head-over-heels in love with Kyoko and asks her to go abroad with him to Beijing, where he has to spend the next few years for his research. But Kyoko cannot decide.