A woman who can't trust people because of her ability to hear lies and a mystic composer who hid his indescribable identity, become involved in each other's lives to uncover the truth.

A boy falls to his death at school, but Ok Chanmi does not believe that her twin brother, Park Wonseok, committed suicide. Chanmi transfers to her brother's school, Yongtan High, and meets Ji Sooheon, who witnessed her brother's death.

A male student's body is found at school. Authorities assume that the student killed himself in a fall. Other students at the school hold a trial to uncover the truth behind his death.

Adapted from the webtoon series "Welcome", this TV series tells the story of graphic designer Kim Sol Ah who brings home a cat, unaware that the animal can turn into a human being.

A man named Shin Woo regrets letting his first love go ten years ago because he didn't have the courage to confess. However, he gets the chance to win her again when he travels back in time, and this time he's armed with the knowledge that she liked him back then too. Unfortunately, he has a pretty strong competitor: himself from ten years ago. The present Shin Woo and the past Shin-woo engage in a fierce rivalry to win their love's heart.