A-mi's lonely birthday turns into a romantic night with Yu-sin. Sa-hyeon finds himself comparing Won's warm personality with Hye-ryung's cold attitude.

Sa-hyeon and Won comfort each other about past and present marital issues. Hae-ryun accompanies Nam Ga-bin to the hospital.

Promising to stay by Won's side, Sa-hyeon proposes a new kind of relationship. Hae-ryun jumps at the chance to make a house call for Ga-bin.

Won, Ga-bin and A-mi open up to each other about their relationships. Hye-ryung turns to her in-laws to get her marriage back on track.

The housekeeper tells an incredulous Dong-mi about seeing the late Gi-rim in the home. Sa-hyeon introduces Won to his mother.

Won and Sa-hyeon tearfully agree to call it quits. Using her husband's apparition as an excuse, Dong-mi moves into Yu-sin's home.

Mun-ho insists on meeting the mother of his future grandchild himself. Hae-ryun reveals his girlfriend's identity to a pained Si-eun.

Si-eun and Ga-bin meet face-to-face as Hyang-gi eavesdrops nearby. On a movie set, an actor wearing a familiar-looking coat catches Pi-young's eye.

Yu-sin puts an expiration date on his relationship with A-mi. Si-eun has bad news for Pi-young: a warning about her husband's possible infidelity.

Pi-young asks Yu-sin about the woman he was seen with at the equestrian club. Won, Sa-hyeon and Hye-ryung unexpectedly cross paths at a restaurant.

A fuming Hye-ryung grills Won about the affair. Hearing of her mother's condition, Pi-young rushes to the hospital... and sees Yu-sin in A-mi's room.

Pi-young is rendered speechless by her husband's betrayal. Ga-bin introduces Hae-ryun to A-mi, whom he recognizes from the equestrian club.

A-mi's meeting with her biological father goes sour when questions arise about a mutual acquaintance. Yu-sin packs up his bags to give Pi-young space.

Hye-ryung gives Sa-hyeon her blessing. A-mi offers her friendship to Pi-young and proves to be a formidable opponent for Dong-mi.

Ga-bin shares devastating news with Seo Dong-ma. Hye-ryung's tearful press conference turns the public against Sa-hyeon.

Yu-sin feels betrayed seeing his ex-wife out with another man. Hye-ryung surprises co-workers with her feelings for Ban. Dong-ma stays by Ga-bin's side.

Yu-sin finds reasons to frequent Pi-young's apartment. Ga-bin's recent loss gives her a realization about marriage. Won goes into labor.

After taking a walk down memory lane with Si-eun, Seo Ban confesses his feelings for his longtime crush. Hye-ryung finds an excuse to visit Ban's home.

Feeling deceived by the new couple, Hye-ryung pushes Si-eun for an explanation. Dong-ma follows his heart and takes Pi-young out to dinner.

The night before a month-long business trip, Dong-ma initiates a whirlwind romance with Pi-young with a confession, proposal and an amusement park date.

After regaining his health, Hae-ryun sets out to also get back his family. Ji-a learns of her parents' divorce and witnesses her father with A-mi.

Ban takes Si-eun and her kids on a ski getaway. Dong-ma rushes back from Germany in time for a romantic Christmas Eve with Pi-young.

Hae-ryun states his objection to Si-eun's remarriage, and Ban's father gathers with Si-eun's family for a meal. Meanwhile, Ji-a agrees to meet Dong-ma.

A noticeably different Hye-ryung appears in front of Sa-hyeon’s family. Hae-ryun tries to convince Hyang-gi and U-ram to live with him.

Hye-ryung and Sa-hyeon give their marriage another try. Soon after Dong-ma tells his father about Pi-young, tragedy falls upon the Seo family.