Joon-ho为他的新继母Min-joo而堕落。 他抑制自己的感情，因为她是他父亲的女人，但有一天他的父亲去世了。 此外，继母一直在向他扔标志，她的女儿Eun-jung离开了房子。 Joon-ho与Min-joo独处，他安慰她失去丈夫。 然而，他最终不仅在精神上安慰她，而且在身体上也是如此。
《妈妈的情人》英文剧情：Joon-ho falls for his new step-mother, Min-joo. He suppresses his feelings because she is his father"s woman, but one day his father passes away. In addition, the step-mother has been throwing him signs and her daughter Eun-jung leaves the house. Joon-ho is alone with Min-joo and he comforts her for losing her husband. However, he ends up comforting her not just mentally, but physically as well.