Seung-jin, who is preparing for an audition to pursue his ambition of becoming a singer, moves into a new studio apartment. On the first night, as he just started to settle in, he hears a woman wailing from next door. With all the noise she makes owing to her badly soundproofed room, La-ni has driven away several neighbors. Seung-jin isn't one to back down easily. Their argument intensifies to the point that they have discovered everything about one other's life through their noises save for their names and faces.
Kang Woo-ram is busy preparing to get a job. Lee Hyun-ji is a would-be anchor, but she works at a homemade hamburger restaurant. One night, Woo-ram visits the hamburger restaurant and orders a double patty hamburger, which has a "buy one, get one free" sale. This is how their relationship begins.
Four different couples have a romantic week over New Year's Eve. Both coming out of failed marriages, Ji-ho and Hyo-young are not open to the possibility of new love, while Jin-ah heads to the other side of globe and encounters Jae-hun.
Young-seok, who feels overwhelmed and lonely in what should be his glorious youth, meets a woman who introduces herself as Josée, and they share a once-in-a-lifetime romance.
Yoo Da-hee, who graduated from the Department of Hotel Tourism and quickly got a job at a motel, tells the story of what happened at the motel by secretly running a podcast. A variety of omnibus episodes.
One day, during a university festival where people are often known to find a partner, the 3 incredibly single members of the robot club decide to attend. There the sloppy and timid Hwi-so meets a very aggressive girl by the name of Hye-jin. His romantic advances, which he learned through reading books and watching YouTube, finally wake up to make their move. But will two finally become one this fall?
Jiu Bing has been stuck in the friend zone with Bo He since he was twelve. Even though he tries everything to win her heart, he fails in crossing the line. When working as a part-time pacer, Jiu Bing meets Xia Tian. They later become internet celebrities by accident.
Summer is a typical girl raised by a firefighter father which inspired her to follow his footsteps. She then meets Rael by chance a couple of times. Rael realizes he actually likes Summer but proving this to her is much more difficult and challenging.
Ryoko Matsumura is a popular writer in her 50's. She also knows that she has Alzheimer’s. Ryoko Matsumura begins to teach at a university. She meets a young Korean man in his 20's. They become attracted to each other.
Miso lives from day to day by housekeeping. Cigarettes and whiskey are the two things that get her through the day. As cigarette prices and rent start to rise, Miso decides to give up her house for cigarettes and whiskey, leading her to couch surf with old friends while reconsidering her place in life.
Along with his young son, Ji-ho, Woo-jin misses his wife Soo-a, who died after promising to return a year later with the rainy season. Miraculously, they reunite with Soo-a when the rainy season comes around, but she has no memory of her husband and son whom she dearly loved.
Hong Seol, a student from a poor family, meets a rich Yoo Jung, who is her senior at her university. They both develop a rather inconvenient relationship after knowing each other.
Hà Mi is a young musician that has a great passion for composing music. G-Feel - a genius musician of Korea, who is facing with the pressure from his fame. Between two strangers, living in two countries, there's a special bond that is Yoon Hee. The story about that speical relationship between them is revealed when G-Feel decides to travel to Vietnam after an incident.
Lee Hyeong is a talented songwriter. He happens to connect people who are not good with love. Those include Hyeong-Gyeong who wants to become a singer, but she suffers from stage fright. Scully is a high school student. She helps Lee Hyeong's spirit. Chan-Young is a colleague of Lee Hyeong and he likes Hyeong-Gyeong, but in vain.
Je-In is a mystery novel writer. She chases after a serial killer with her longtime friend Rok-Hwan. Rok-Hwan is a detective. A handsome and mysterious man, Jason, appears in front of them.
Chul-soo is the only son of a legendary thief family. He falls in love with Young-hee who is a police officer. Her family is also a police family. To get her parents’ permission to marry, Chul-soo undertakes an exam to become a police officer, but both families work to prevent their marriage.
Beautiful, workaholic Bo-hee is a successful marketing executive at the number one toy company in Korea. Respected by her colleagues and in line for a promotion, she makes an irrevocable mistake that gets her fired from her job. Bo-hee's life further spins out of control when her husband Gang-sung leaves her soon after. Bo-hee is befriended by her neighbor Nan-hee, an amateur sex expert who runs a sex shop on the brink of bankruptcy called "Casa Amor." Nan-hee's predicament inspires Bo-hee's creativity, and using her background in children's toys, she is determined to save the shop by making its ambiance more refined and by promoting better sex toys.