“We were together for too short and separated for too long.” Eun Ho is an A-list South Korean actor, and for 20 years, he is searching for his first love, Eun Dong. They were teenagers when they first met, and after a brief friendship, she disappeared. Ten years later, they miraculously run into each other and start dating, but one day, Eun Dong doesn't return to meet Eun Ho as planned. Another ten years pass, and when Eun Ho is a famous star, he decides to publish a book about his love story to find Eun Dong. Meanwhile, Eun Dong becomes a writer and is living with a new name ever since she lost her memories due to the tragic accident that kept her from returning to Eun Ho. Through a mutual friend, she is hired to ghostwrite Eun Ho's book! During the process, she begins to uncover secrets that unravel the life she knows.

Feeling like the epitome of failure, recent college graduate Grace (Grace Subervi) drunkenly stumbles her way through New York City, making her way to, and eventually into, the Hudson River. Upon awakening, she finds herself in another world — or rather, another country: South Korea.

Her troubles only worsen when she literally bumps into Kyung Hwan, a wealthy boutique owner with little patience to spare. Through Kyung Hwan, she meets aspiring K-pop idol, David, where all three come to terms with what it means to pursue their dreams.

Two girls with a twisted fate, born on the same day, Lee Eun Hee and Lee Keum Hee live their lives as sisters. Living a life of poverty with their family, kind and considerate Eun Hee sacrifices her educational chances to better herself for her older sister Keum Hee. Eun Hee's true identity unbeknownst to her, one day a wealthy older man comes to their home requesting the return of his long lost granddaughter. Due to an accident that caused the death of her husband, in spitefulness, the girls mother returns the wrong granddaughter to the older wealthy man and leaves the real granddaughter in a life of struggling and hardship.

Zhang Zhen Dong gets a knock on his door from his 12-year-old self from the past. His life is thrown into complete chaos as he struggles to play parent and hides the identity of his mini me from his neighbours....

Two people from seemingly two different worlds are brought together when an accident leads to Su Jing Jing, a seemingly cute girl but with supernatural ability gets hired as Gu Rong's bodyguard.

Cha Heon is a student at Chun Ji High School who has both good looks and brains. He appears to be a cold character, but he is actually someone with a warm heart who is awkward at expressing himself well. Shin Sol Yi is a bright and bubbly 17-year-old who has a crush on Cha Heon. She openly confesses her love to Cha Heon continuously, and she is a clumsy but lovable character.

Woo Dae Sung is a talented swimmer who transfers to Chun Ji High School and falls for Shin Sol Yi. He does not express his feelings for her and quietly stays by her side.

The three musketeers, Qin Huai, Zhou You, and Chen Mo, wander around the Internet world. Although their personalities are different, they all uphold the original intention of "technology for good". Together they are in the process of fighting against certain Internet criminal groups.

Joe, Jiro and Xu Lu live in a condominium where its residents are forbidden from falling in love, and anyone who violates the rule would be evicted from their apartment. Against all odds, Joe and Xu Lu fall in love with each other and begin an underground relationship. Thrown into the mix is Jiro who plays Xu Lu’s childhood sweetheart, thus starting an unfortunate love triangle.