A middle-aged man time travels to the past to become a teacher to his 17-year-old classmates.

<>pHao Hui Gui is a 36-year-old high school teacher who is still single. During a gathering, he gets into a huge disagreement with everyone present and even gets into a fist fight with his best friend. Upon returning home, he mindlessly flips through his personal diary from 20 years ago and starts to recall many memories from the past. He falls asleep eventually and meets with his younger self in his dreams.

drama

Kwon Hyuk Joon's grandfather, the head of the traditional Kwon family agrees to an arranged marriage between his grandson, Hyuk Joon, and Yoon Jung Sook when Yoon Jung Sook is born. Eventually, the two families lose contact with each other, because soon after the contract is signed, Jung Sook's family encounters financial issues and is forced to run away.

18 years later, Jung Sook has grown up to be a rebellious and strong-willed girl who just wants to live her life as she sees fit. With little aspirations, she is the direct foil of her achievement-bound counterpart, Hyuk Joon. When the two meet again, they clash horribly; Jung Sook thinks her fiancee is nothing but boring, and Hyuk Joon believes Jung Sook to be nothing but an immature child. Despite this, they marry. What follows is the story of their new life living together as a couple, and the obstacles they are faced with.

Takayanagi is a mysterious high school teacher, who teaches ethics. His students look innocent, but they have serious problems like being bullied and harming themselves. Takayanagi tosses out words & ideas in ethics and philosophy to his students. The words written in the ethics textbook seem boring, but the words by such figures like Socrates affect the students to deal with their own problems and lives. (Source: AsianWiki) ~~ Based on a manga of the same name

Lu An Na is an ordinary girl working for a magazine company. She gets a call from her korean boyfriend saying his last words of "Farewell". She turns on the television and learns that the South Korean ferry he is in is sinking. Unwilling to believe the tragic turn of events, she resolutely embarks on a journey to chase the truth and find her lover.

Yeo Mi-ran is a rookie attorney at Gilmu Law Firm, which works primarily with the entertainment industry. She is not interested in having a romantic relationship and she hates to lose to a man in anything.

Nam Kang-ho is a top actor in the entertainment industry. He is the most popular actor in South Korea due to his handsome appearance, intelligence, and kindness. He is sought after to work in romantic movies, but he doesn't actually trust women.

Yeo Mi-ran and Nam Kang-ho, who both don’t believe in love, fall into a love battle.

Is there an app to help you get the woman you love? Kim Hong Sik (Shin Jae Ha) is a shy young man who returns to college after serving his mandatory military service. He discovers an app called T-Scope that helps him to see other people’s secret messages. Can he use it to help him capture the heart of the “Queen of the Engineering College” (Ryu Hwayoung), whom he has secretly loved for years?