[3] Lee Jeong-in (Han Ji-Min) is a librarian who has been in a relationship with a banker, Kwon Gi-seok (Kim Jun-han) for 4 years.

She tells him she is in a rush, but then realizes she has forgotten her wallet because she left it at her friend's place, where she stayed the previous night.

(Single parenthood in South Korea is still frowned upon even though some attitudes about the subject are changing to be more positive.

Both Ji-ho and Jeong-in have to make uncomfortable decisions, and the road for them is never easy as they prove to their parents and friends the sincerity of their feelings.

As a subplot running throughout is the relationship of Jeong-in's sister with her husband, who is abusive and violent, and, though they are effectively separated, will not let her divorce him and threatens her when she brings it up.