An epic love relationship between Lee Jung In, a librarian who has been in a 4-year relationship together with a single dad and a pharmacist namely Yoo Ji Ho.

A coincidence scene after Lee Jung In meets Ji Ho in his pharmacy, they started to date and seeing the love for each other as they start a new relationship.

A typical love story after Lee Jung In went to the pharmacy to cure her hangover. Upon paying the medicine that Ji Ho prescribed her, she said that she accidentally forgot her wallet at her friend's house. Ji Ho told her to pay him back later.

They decided to exchange numbers although Lee Jung In is in a long term relationship with Kwon Gi Seok. Parents of Lee Jung In and Kwon Gi Seok have always been pressuring her to get married even though she is not ready for it.

When she met Ji Ho, she is now hesitant to marry Gi Seok and felt doubtful along with their current long term relationship. The characters show a very dynamic way of flaunting their skills in acting.

Ji Ho afterward became interested in Jung In after their first meeting. The production staff made a good sequel of the story. Ji Ho does not respond intentionally to the texts of Jung In so that she will come back again to pay for him.

When she finally revisited the pharmacy of Ji Ho, it showed interest in her. But Jung In said that they can only be friends because she is in a long term relationship.

Later on, she discovers that Ji Ho is a single parent and has a child. However, Ji Ho always calls Jung In and tells her to meet and see each other with no apparent reason.

Prior to the scheduled television air from May 22 to July 11, 2019, the lead female role was first offered to Son Ye Jin who appeared in the television series "Something in the Rain" last year, but unfortunately, she declined the offer.