This drama follows the lives of two men and a woman through two eras: one during the 1930s Japanese occupation of Korea and the other in the 21st century. The three main characters are:

(1) Han Se Joo who was a writer in his past life and a bestselling author in the present. But Se Joo is depressed with writer’s block so he can't write his next book.

(2) Yu Jin Oh owned a bar in his previous life. In 2017 he is a talented ghostwriter who can bail Se Joo out of his predicament, but the mysterious man has a condition for his services. Se Joo may not be able to meet it.

(3) Jeon Seol was a sniper. Now she has extremely varied expertises. She is a former Olympian hopeful, a veterinarian and a book lover who runs her own delivery service. She oscillates between extreme fandom and an anti-fandom of Se Joo.

The intricately woven story of these three characters unfolds to reveal strange mirroring connections between the time periods as well as possibilities for past lives to be redeemed or improved in the modern world.

I met her on the first day of work. My stomach is fluttering with butterflies because of my manager nowadays. Am I the only one with butterflies?

Kehas See Dang 2011 Andrew Gregson as Doctor Ruj Rujiroj Mint Natwara Wongwasana as Araya (Noi) Charm Irvin Osathanond as Saowarot Big Sarut Vijittranon as Pakinai Patsachon Soopree as Pakinee Kittipit Nilnoparat (Bird) as Charlie Srikanya Sakdidej Panupan (Por) as Wattana Suchao Pongwilai as General Saen Seneenarong Chalisa Thaochalee as Ampa Kriangkrai Aunhanan as Doctor Phra Sanyapatpisut Rong Kaomoonkadee as Khun Prajonkadee Ruj Rujiroj is an only son of General Saenseneenarong, the owner of Ban Rujiroj, also known as "The Red Mansion". He lacked of mother since he was born. Later, when Ampa and her baby daughter, Araya or Noi moved in as his step mother, he was very upset at them because he thought that this woman tricked his father to replace his mother and her baby stole attention from his father. So, Ruj asked his father to move to stay in the boarding school and went to study abroad after that. After he graduated, he came back to Thailand, but he refused

Nine men and women in heaven become couples and soon find themselves back on Earth participating in the "Love Game." 

Jia Yang, in the mist of poverty, bumped into a rival in love from yester years, after a few words of insults, he got to know the real reason of his breakup with his first love during student days, Ge Ying. He went to explain to Ge Ying, but was rejected outside her house. However, by a series of coincidences, Jia Yang went back to school to write his "final love letter". Unexpectedly, the love letter opened a time travel portal, leading Jia Yang to experience a series of differing love journeys, during these journeys, Jia Yang finally understood what his heart truly wants, therefore he bravely pursuing true love, pursuing his journey to the future with resolve.

Shi Hua Hua is a medical student who studies Chinese medicine and is great at marital art. One day she accidentally hits and hurts Zhou Zhi Fei, a domineering CEO, after arguments and misunderstandings the two eventually fall for each other.

Jinake Saman is the university moon in the engineering faculty, known across the whole campus as the hottest moon. There was the saying among the campus “Nothing and no one was hotter than Mr. Jin!” One day when his girlfriend broke up with him, he fell apart in despair. He later discovered that the girl who broke his heart was the cousin of law student Bom. Jin misunderstands that Bom and his cousin were flirting when actually he likes Jin. Bom has liked him since he was a freshman one year ago after Jin exchanged Bom’s lunchbox (because he couldn’t eat anything spicy) with his own food and rice. As feelings grow between them, can Jin understand Bom’s true intentions and come to see Bom as more than just a junior?

The Mobile Investigative Unit (known as "MIU") of the Tokyo Metropolitan Police Department attempts to solve cases within 24 hours.

Detective Shima Kazumi is selected as a new member of MIU. He is intelligent, with excellent observation and communication skills. Yet, he does not trust other people. He is unable to find a partner in MIU and is ordered to partner with Police Officer Ibuki Ai, who works at a police substation. Ibuki applied for MIU, but he failed. He is in excellent physical condition, but he lacks knowledge and experience as a detective. Shima learns about Ibuki's background and he becomes more nervous. Finally, Shima has his first meeting with Ibuki.