A man who visited for a business trip in the suburbs happened to stop by a soapland where he met a woman who turned out to be his neighbor, Mio, a married woman living in the next apartment. The man, who had always been envious of Mio's happy marriage, had his desires heightened after meeting her and gradually made bolder demands. Mio, desperate to avoid being discovered by her husband, accepted his requests. Her warm and complicated feelings deepened their relationship.