Ahn So-yo

Ten years after discovering her murdered uncle, Ena and Detective Hansaem must cooperate to stop a series of similar murders - each linked by strange puzzle pieces.

Every last Thursday of the month at an all-girls high school, the students of Class 2–5 cast their votes in a popularity poll. The results classify them into Grades A, B, C, D, and F. If they fall into Grade F, they become legitimate victims of school violence.

Ju Eun-ho is an unknown announcer with 14 years of experience. She struggles to get the chance to have her name recognized by the public. She also has another personality, Ju Hae-ri, due to a deep wound in her heart. Her alter-ego, Ju Hae-ri, is super positive and works as a parking attendant. Jeong Hyun-oh is Ju Eun-ho's ex-boyfriend; they dated for a long time but broke up. He became a star announcer as soon as he joined the broadcasting station and is the most-liked announcer by the public, but Jeong Hyun-oh also carries a hidden wound in his mind that he has never shown to anyone. Somehow, Ju Eun-ho and Jeong Hyun-oh reunite and help cure each other's wounds.

Eun-mi is just like any other woman her age, with the exception that she gave birth to her daughter, Jin-hee, while she was in high school. Living under the same roof as Eun-mi is no different for Jin-hee than raising her own daughter, and it's often difficult to determine who plays the role of the mother. Despite their roommate-like conflicts, deep down they know they can rely on each other when things get a little too chaotic. As a fresh day begins, Eun-mi and Jin-hee step into another day of their remarkable journey, where the ordinary becomes extraordinary in their uniquely intertwined lives.

Years after surviving horrific abuse in high school, a woman puts an elaborate revenge scheme in motion to make the perpetrators pay for their crimes.

Nam Geum Pil is a man in his 40's and he lives with his father and daughter. Out of the blue, he decides to quit his job. He receives criticism from his family, but he doesn't care. He freeloads from his friend when he wants to drink alcohol. Meanwhile, Nam Geum Pil becomes aware of a male neighbor who looks like an unemployed man, but he actually makes a lot of money as a webcomic writer. Nam Geum Pil then decides to become a comic writer.

Every day is extraordinary for five doctors and their patients inside a hospital, where birth, death and everything in between coexist.