Nanase Sakura is a 23-year-old rookie nurse. She met Doctor Kairi Tendo several years ago and fell in love with him. To meet him again, she studied hard and became a nurse. After 5 years, she finally meets Kairi Tendo again, but he has a totally different personality than what she imagined. Kairi Tendo, who is 31-years-old, is commonly referred to as the "Devil" at work. He is a level-headed perfectionist and often makes biting remarks to doctors and nurses. Nanase Sakura works hard to receive recognition from Kairi Tendo and she also expresses her feelings honestly to him. Due to her persistence, Nanase Sakura becomes well known at the hospital and she picks up the nickname of the "Warrior." Meanwhile, Kairi Tendo becomes attracted to Nanase Sakura.

A warm, friendly, considerate person, Hee Jae is surrounded by people who claim to know and love her. The problem for Hee Jae is that she isn’t really sure if she really understands herself. On the other hand, Mi Na is Hee Jae's confident and energetic best friend and colleague at Play Books, a supplier of books and related products centered around sex and romance. While an expert in how to achieve physical pleasure, her understanding falls short on romantic relationships. When they find themselves told to take over hosting a sex and romance advice podcast, the two feel more than a little lost...

A high-achieving high school graduate, battles for justice at South Korea’s most reputable accounting firm.

Nam Se-Hee is a single man in his early 30s. He has chosen to not marry. He owns his home, but he owes a lot on his mortgage. Yoon Ji-Ho is a single woman in her early 30s. She does not own a home and envies those that do. She has given up on dating due to her financial struggles. Yoon Ji-Ho begins to live at Nam Se-Hee’s house. They become housemates.

In a colorful Seoul neighborhood, an ex-con and his friends fight a mighty foe to make their ambitious dreams for their street bar a reality.