You and Jaehyun are married and have a child named Hana, you live very well off and are very happy, until one day your mother tells your sister named Nara to just live with you, for a year you live together but you are busy taking care of your bakery so you don't know that Nara is already having a intimate relationship with Jaehyun

when everything is revealed, nara keeps apologizing to you and jaehyun also does the same thing as nara, but you feel disgusted by it