Park Do-kyung (Eric Mun) is a sound director in his 30s. One year ago, his bride, Oh Hae-young (pretty) (Jeon Hye-bin), disappeared on their wedding day leaving him miserable. One year after that incident, Do-kyung was told that Hae-young is going to marry a young entrepreneur named Han Tae-jin (Lee Jae-yoon). He exacted revenge by sabotaging Tae-jin's business leaving him bankrupt. However, Oh Hae-young (just/"그냥") (Seo Hyun-jin) was actually just a stranger who coincidentally has the same name as the other Oh Hae-young (pretty) who left him. Coincidentally, Oh Hae-young (just) is the girl that Do-kyung had been seeing lately in his visions, and he sees snapshots of the future with her in it.
Tae-jin was soon to be sent to jail due to bankruptcy, and hence before his imprisonment he meets his fiancée, Hae-young (just), and tells her that he does not love her enough to marry her and wants to call off their wedding. In fact, Tae-jin was lying and his true intentions was to let her go so that she will gain happiness. Amid the situation, the lives of Do-kyung and Hae-young (just) turn as they cross paths. After sharing similar unfortunate experiences of being dumped before their weddings, the two of them got even closer.
A 36-year-old man, he is a sound director. He has a very reserved and aloof personality and is intimate and meticulous with his work. He is unable to forget his ex-girlfriend, Oh Hae-young (pretty), who disappeared on the day of their wedding. After he mistook Oh Hae-young (just) for Hae-young (pretty), Do-kyung keeps seeing visions that are always related to Hae-young (just) as if he sees the future. He falls in love with Hae-young (just) but knows he doesn't deserve her, because he was the one who ruined her wedding with her ex-fiancé, Han Tae-jin.
A 32-year-old woman who works as product planning team representative of the catering division of her company. Her life got ruined after her ex-fiancé Tae-jin dumped her the day before their wedding, and as a result she becomes the main topic of gossip because of it. She describes herself as a pitiful and unlucky person but is cheered up by Do-kyung and eventually becomes attracted to him. Meanwhile, she is clueless that Do-kyung is the person who ruined her wedding. Due to having the same name as the beautiful and perfect Oh Hae-young (pretty), she is always compared and feels small.
A 32-year-old woman who is the TF team leader of the catering division Oh Hae-young (just) works in. She also is Do-kyung's ex-lover who ditched their wedding and left for Europe. After one year, she still loves him and decided to come back to him. She comes from a wealthy family with many marriage issues, where her mother and father marry and divorce back-and-forth, and has many step-siblings. She always appears cheerful in front everyone in order to hide her true self who lacks love from her parents.
A 44-year-old woman, she is the catering division director and Do-kyung's older sister. She is an alcoholic who always babbles in French when she gets drunk and has a habit of falling for any man whom she ever sleeps with. Hae-young (just) and her other subordinates give her the nickname "Isadora" ("isa" = two four (24) and "dora" = "running around" meaning she is around at all times) because of her habit of constantly checking up on her subordinates.
Kim Ji-seok as Lee Jin-sang, a 36-year-old lawyer who is Do-kyung's friend. He is the first person who mistook Hae-Young (just) for Hae-young (pretty) and persuaded Do-kyung to seek revenge. Jin-sang convinced to stay in Do-kyung's house for a while to protect himself from dangerous people that are related to the case he is handling. In reality, Jin-sang is hiding from the husband of a woman who recently seduced him.
Heo Jung-min as Park Hoon, a 33-year-old man who works as a sound recording studio staff and Do-kyung's younger brother. Although they have the same last name, Do-kyung and Hoon are not actually blood-related - Do-kyung and Soo-kyung are from the maternal side, while Hoon is from the paternal side. He seems to be frustrated with his step-brother, and they don't get along with each other often and share different opinions. He always gets crazy while searching for a girlfriend.
Nam Gi-ae as Heo Ji-ya, a 63-year-old woman who works as a film producer and Do-kyung's mother. She is a gold-digger and only cares about living a luxurious life, and always asks Do-kyung for money even though she never pays him back. She was against Do-kyung's marriage to Hae-young (pretty) as she knew Do-kyung wouldn't give her money once he gets married. For this purpose, she emotionally and psychologically tortures Hae-young (pretty) into running away on the day of their wedding.
People around Oh Hae-young (just/"그냥")
Lee Jae-yoon as Han Tae-jin, a 36-year-old entreperneur who is the ex-fiancé of Hae-young (just). He decides to call off their wedding and dumps Hae-young (just) in order to let her live happily. Not long after he dumped her, Tae-jin went to jail because of the bankruptcy. He is curious as to why Do-kyung decided to destroy his business as they never met each other previously. Even after he walks out from jail, he still has feelings for his ex-fiancé, Hae-young (just).
Lee Han-wi as Oh Kyung-soo, the 60-year-old father of Hae-young (just). He is talented in cooking and seems to be more patient and calm than Hae-young (just)'s mother.
Kim Mi-kyung as Hwang Deok-yi, the 57-year-old mother of Hae-young (just). She feels pressured after her daughter called off her wedding, as her friends in the neighborhood keep talking about her daughter behind her back. Deok-yi has a weird habit of taking off her clothes when she is angry.
Ha Shi-eun [ko] as Kim Hee-ran, Hae-young (just)'s best friend who works as a film producer. Thanks to her, Do-kyung and Hae-young (just) meet for the first time in person. She has been Hae-young (just)'s sole dependable friend since their high school days. Even though both of them are close, Hee-ran is popular with boys unlike Hae-young (just).
Lee Hye-eun [ko] as Jeong-sook, Hae-young (just)'s aunt who used to help with housework often. However, after Hae-young (just) canceled her marriage, she became annoying and often argues with Deok-yi.
Heo Young-ji as Anna Yoon, a 21-year-old part-time staff of a convenience store and Hoon's girlfriend. Anna seems to not want to get married during her lifetime. During their 100th day anniversary, she wants the both of them to live together, but Hoon constantly rejects her idea because they are an unmarried couple.
Kang Nam-gil as chairman Jang, a 74-year-old chairman and Hae-young (pretty)'s step-father, as Hae-young (pretty)'s mother was once married to him but eventually got divorced.
Choi Byung-mo as Park Soon-taek, Do-kyung's psychiatrist and the only person who knows about his visions that are related to Hae-young (just).
Kwon Min [ko] as Kim Seong-jin – Hae-young (just)'s workshop colleague
The leader of the catering division "Seasonal Table" team
In the table above, the blue numbers represent the lowest published ratings and the red numbers represent the highest published ratings.
This series aired on a cable channel/pay TV which normally has a relatively smaller audience compared to free-to-air TV/public broadcasters (KBS, SBS, MBC, and EBS).