Kobayashi left his wife and children behind to move to the city, where he spent his days relieving stress through gambling to kill time and loneliness. He ended up falling behind on his rent. Then his landlord's wife, Chisato, showed up. Always caring about Kobayashi, Chisato is kind and asks him to have a physical relationship in exchange for forgiving the overdue payments. Being used as an outlet for the sexual desires of a frustrated wife who is ignored by her husband, Kobayashi falls into a messy adulterous relationship with Chisato.