- THE UNEXPECTED SERIES : BOOK I - Devastated by the sudden confession from her boyfriend, Park Edlyn decided to go to the rooftop to clear her mind. That is until she met Sim Jake, a handsome neurosurgeon who worked at her father's hospital. They both decided to get drunk and tell each other life stories. It was going so well until they both woke up sober in the same hotel room with marriage documents on the table. They realised they got married due to a drunken mistake but both of their families didn't want them to get an annulment because it would ruin their reputation. Can Edlyn and Jake live together without having the urge to kill each other?

- THE UNEXPECTED SERIES : BOOK II - Daera came back to Seoul as an intern at the Park Specialist Hospital, knowing she would have to see Sunghoon who broke her heart, every day. But little did she know, her heart started growing for Jay, who has always been a gentleman to her. Will she ever know her true feelings? Will she know who has won her heart all the time? Unexpected murders happened too often that made them suspicious of something. Daera, Sunghoon and Jay must find the culprit behind all of the murders and the reason for it.