After his wife passed away, Mononobe, the Japanese pub keeper of "Mononobeya" has been living with his daughter, who dreams of studying abroad in America. His store was flourishing until one day a mysterious visitor came and criticized his Sake. Soon after, his customers stopped showing up. A regular of the pub Tsuneda, who has been dating Mononobe's daughter without telling him, brings a flyer of "Yumedono". Yumedono is a Japanese pub that moves around the country in a truck. Mononobe and Tsuneda find the mystery visitor is in fact the owner of Yumedono. Mononobe and Tsuneda visit Yumedo to investigate. The warm Sake which Yumedono produces is astonishingly delicious. When Mononobe peeps into the back of Yumedono's truck, he sees the owner of Yumedono's young wife is exercising with a special leotard filled with Sake. The secret of Yumedono's warm Sake is the warmth which a young woman's body provides, along with sweat and other bodily secretions. Mononobe then almost immediately mimics the process with the forced help of his daughter, only to find the resulting taste far from what he sought for. He then tries the same procedure on the mistress of Ohiso, an expert in "Seaweed-Sake," but the taste was different as well. After the mistress looked farther into the matter, she finds out that the owner's wife is actually his daughter. The daughter is forced to keep her virginity because of the marriage with her father. Mononobe then is shocked that his daughter is no longer a virgin because he no longer possesses the means to produce his delicious warm Sake. A call from Ohiso's leads Mononobe into having his daughter undergo hymen regeneration surgery. He succeeds in creating Sake more delicious than even that of Yumedono's. The owner of Yumedono loses everything as his daughter elopes. Meanwhile, Mononobe's daughter, unable to forget her dream of studying abroad, also plans on running away as well.