33-year old Han Je In is a mystery novelist who is notorious for habitual false reporting to the police in town. Her only friend is police officer Rok Hwan, who has had a crush on her since childhood. One day, Je In hears a scream of help from an apartment upstairs and reports that a serial killer lives above her but no one believes her. Convinced that Jason, the handsome man living upstairs, is a serial killer, she asks Rok Hwan to help follow him around with her. But as she learns more about Jason in her pursuit to uncover the truth, she begins to fall for him. Seeing her in this state, Rok Hwan feels a tinge of jealousy.
Left alone on a trip to Hong Kong, Tomoko, a sales woman from Japan finds herself the victim of a purse-snatching. The police arrest the man she points out, but it turns out to be the wrong person: a young Korean man named Ji Hoon. Despite his anger and humiliation, he takes her out to dinner since she has lost all her money, and in return, she agrees to model for his amateur film. What follows is a magical and romantic two days. Upon returning to their respective countries, Tomoko must return to her nine-to-five job and Ji Hoon must resume studying to join the family business rather than pursuing his dream of becoming a film director. But soon the two begin to email each other and rekindle their relationship despite the distance and obstacles between them. Marking the very first time in television history that a drama has been co-produced between Japan and South Korea, the story shows us that love has no borders.
In the romantic-comedy "Boku to Star No 99 Nichi", top Korean actress Han Yoo Na falls in love with a quiet man named Kohei Namiki. Kohei Namiki is a single man approaching his 40's. He works part-time at a security company. He has a sweet and handsome appearance which some people take advantage of as he is easily swayed by those around him. Kohei often takes care of his sister's three kids because his sister has a habit of wandering around. He is a passionate man and dreams of finding his star, but because of his family and economic situations, Kohei can't follow through on those dreams. One day, Kohei is assigned security detail for the beautiful actress Han Yoo Na. Even though she has a near perfect appearance and style, she prefers to act like a normal person. She enjoys eating simple Japanese foods, and on the filming set, Yoo Na goes out of her way to help others. Yoo Na has a pure and kind spirit and seems to be the envy of all. Inside, however, Yoo Na is lonely working in the entertainment field and she has a big secret. At first, bodyguard Kohei and top star Yoo Na don't get along. With time, they become closer. Over the next ninety-nine days, their relationship changes. But on the hundredth day when the contract ends, what choice will they make?
Hanamura Aiko is a skilled lawyer who specializes in divorce cases. She is a warm-hearted person who sympathizes with clients who are suffering from marital problems, but she grew up seeing her parents' discord, and has lost faith in romance and love. She dotes on her recently adopted dog, Sakura, and is enjoying her single life. Shirosaki Kai is the director of a 24-hour animal hospital who deals with life every day. He is loved by staff and patients for his good looks and skills, but he doesn't talk much about himself and keeps people away from him. A year ago, he rescued a stray dog ??that was brought to the hospital and named it "Shogun". One day, while walking Shogun, Kai meets Aiko with Sakura. At that time, the two dogs fell in love at first sight, and the destinies of the two began to change. Woo So Ha is a friendly young man from Korea who is popular wherever he goes. Woo So Ha has come to Japan with a mission and tries to get closer to Kai, and by chance, he also meets Aiko.
