Byun Ji Sook, burdened by her father’s debts and relentless loan sharks, dreams of a better life. A twist of fate introduces her to Eun Ha, a wealthy woman who looks just like her. Seizing the chance, Ji Sook assumes Eun Ha’s identity and steps into an elite world, where she meets Min Woo, a wary chaebol heir drawn to her authenticity. But how long can Ji Sook maintain the façade and conceal her true self?

Yeon Joo is an elite prosecutor who started from the bottom. Although known as the best in corruption investigations for the Supreme Prosecutor’s Office, she suffers amnesia after a car crash when chasing a suspect. As she wakes, she finds herself being Kang Mi Na, the daughter-in-law of the conglomerate Hanju Group. Before her disappearance, Mi Na was a troublemaker born out of wedlock. Now sitting in her position, Yeon Joo is not able to hide her rough and outspoken nature. She then meets Seung Wook, a conglomerate who visits his first love Mi Na to reveal the truth of his father’s death. Will Yeon Joo and Mi Na be able to regain their lost memories in this mystery and succeed in true love?

In Ji works for a contract marriage provider in NM. The company provides its clients with a spouse for a fixed-term 1-year contract marriage. In Ji has finished her 4th contract marriage. She meets Jeong Won for her 5th contract marriage. Jeong Won works as a music producer. His life is filled with anxiety and loneliness due to the pain from his past. He still badly misses his ex-wife, Seo Yeon, who applied for the spouse-providing company NM for him.

Jeong Won meets In Ji from NM, and he begins his second marriage with her. They get to know each other and get used to each other as time passes. One day, a mysterious trunk is recovered from a lake. This leads them into a whirlwind of secrets behind the NM company.

Marriage Contract (2016) is similar because it has contract marriage
After being diagnosed with a possibly terminal brain tumor, Kang Hye Soo, a desperate single mother, agrees to be a liver donor for her new boss’ mother. In exchange, she will receive a significant sum of money that she hopes to leave to her daughter. In order to pass the screening process, they must legally wed and convince the hospital that they’ve been in a long-term relationship. What they foolishly thought would be a quiet transaction between the two of them, quickly becomes more complicated as more people get involved, including her 7-year-old daughter. Money isn’t the only thing required for happiness, and love makes life worth living.

In Ji works for a contract marriage provider in NM. The company provides its clients with a spouse for a fixed-term 1-year contract marriage. In Ji has finished her 4th contract marriage. She meets Jeong Won for her 5th contract marriage. Jeong Won works as a music producer. His life is filled with anxiety and loneliness due to the pain from his past. He still badly misses his ex-wife, Seo Yeon, who applied for the spouse-providing company NM for him.

Jeong Won meets In Ji from NM, and he begins his second marriage with her. They get to know each other and get used to each other as time passes. One day, a mysterious trunk is recovered from a lake. This leads them into a whirlwind of secrets behind the NM company.

Kang Bit Na is an elite judge with a beautiful appearance, but she is a demon. Her mission as a demon is to kill evil people who lead other people to their deaths and don't reflect on their actions. She sends these people to Hell afterwards. One day, Kang Bit Na meets Han Da On. He has a friendly and gentle personality. As a detective, his mind is sharp and he has a keen sense of observation. But he carries a pain inside that nobody knows about. After Kang Bit Na and Han Da On meet each other, their lives change greatly.

Lee Gun used to be a promising tennis player, but he was injured. After that, he lost all of his self-esteem, and his life completely changed. With the use of a memory eraser, his memory is erased, and he is reborn with maximum self-esteem and presence. His first manipulated love is Kyung Ju Yeon, a psychiatrist at the brain research center. Other people around him include his younger brother Lee Sin, who is ranked the world’s no.1 ranked tennis player. Meanwhile, Jeon Sae Yan is Lee Sin’s translator.

An unpredictable romantic fantasy drama about a 19+ web novel writer, Nam Ja Yeon, who possesses the female protagonist of her own novel, Seo Yeon Seo, and develops a romantic relationship with the male protagonist of her romance novel, Kang Ha Jun. Ja Yeon possesses Seo Yeon Seo but panics when she finds out that the perfect man, Kang Ha Jun in the 19+ web novel, is not her muse, Yeo Ha Jun, but Bok Gyu Hyeon of "No Gain No Love".

Kang Ha Jun is the perfect male protagonist in the novel written by Nam Ja Yeon. Kang Ha Jun is the president of Seo Yeon Seo's company, GB Electric, in the novel. He seems cold-hearted but is endlessly affectionate to the woman he loves. He is the perfect chaebol man who meets Yeon Seo and learns of love. He presents exciting chemistry as he faces her sudden change overnight and their single-minded romance.

Jung Ki Hoon searches for strange supernatural phenomena as an archaeologist, but an unexpected case causes his life to change. He now publishes the occult magazine Monthly Strange Story and runs the YouTube channel Monthly Strange Story. Because of his ex-wife, Lee Soo Jin, he goes to Jinyang County to research "Gwibul" (a Buddhist statue possessed by an evil spirit). There, he faces an incredibly bizarre and fearful phenomenon.

Lee Soo Jin used to decipher letters and symbols as an archaeologist. She was excellent at her work. But, her only child dies, and she then goes to Jinyang County. There, Lee Soo Jin experiences mysterious phenomena, which leads her to search for answers.

Meanwhile, the people of Jinyang County, including police substation chief Han Seok Hee, her son Han Do Kyung, governor Kwon Jong Soo, and trouble maker Kwak Yong Joo face incredibly bizarre phenomena.

An unexpected case leads Lee Yeon back in time to 1938, where he reencounters Ryu Hong Joo. Once a guardian spirit of the mountain in the west, she's now the owner of a high-end restaurant in the capital city of Gyeongseong. He also meets his younger brother Lee Rang. Meanwhile, another former guardian spirit and ex-friend Cheon Moo Young has become hostile. Lee Yeon struggles to return to the present, to his loved one.

The never-ending monsterization crisis. Hyeon Su, consumed by monsters, tries to regain his human self. Nam Sang Won, who entered Pyeon Sang Uk's body, visits the survivors' stadium with a group of people to achieve his goal. And unlike the previous rules, they put forward an unconventional condition to provide convenience to those with symptoms. Stadiums are no longer safe spaces, and people are confused. Meanwhile, Eun Hyeok, who was reborn from the cocoon, appears in a new form... Season 3, which will mark the finale of the desperate struggle of those who are faced with a choice between the border between monsters and humans.

Following the death of his family in an accident, loner Cha Hyun Soo moves to a new apartment. His quiet life is soon disturbed by strange incidents that start occurring in his apartment, and throughout Korea. As people start to turn into monsters, Hyun Soo and the other residents try to survive.