Saiharu has arranged an arranged marriage with the son (Katsutada) of the parent company president (Tadashi) of a small engineering firm run by her biological father. Her greedy and woman-loving Tadashi noticed her Saishun at a certain meeting and succeeded in keeping her close by marrying his son. Tadashi began to show her true nature while living with Saiharu. In addition to making up that Saiharu is having an affair with her other man, he puts pressure on her father to force Saiharu into a situation where she has no escape.
