A boy falls to his death at school, but Ok Chan-mi does not believe that her twin brother, Park Won-seok, committed suicide. Chan-mi transfers to her brother's school, Yongtan High, and meets Ji Soo-heon, who witnessed her brother's death. A "hero," who avenges bullied students, appears at Yongtan High. Chan-mi speculates that it may be connected to her brother and starts looking for this hero.
The top 0.01% of students control law and order at Jooshin High School, but a secretive transfer student chips a crack in their indomitable world.
A teenager manages to stumble upon a phone application, where, upon writing a person's name, that person is punished. Moreover, she uses this newfound power for her own benefit.
In-ha and Ha-myeong become reporters for different reasons: one aspires to follow in her mother's footsteps and the other seeks to do honest news.
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.
No Go Jin is the most popular mathematics instructor in the private education field and the CEO of GOTOP Education. Even though he has only a high school level education, he has achieved all of his success due to his extreme intelligence. He seems like a perfect man with a handsome appearance, high IQ, and wealth. He is also narcissistic. One day, he is suddenly warned that he will be murdered. Lee Shin A works as No Go Jin’s secretary. She is a diligent and responsible employee. Due to her quiet and introverted personality, she has little presence with her boss No Go Jin and her colleagues at work. Her colleagues begin to recognize her, because she has worked for the notorious No Go Jin for more than 1 year. She then learns that she does not have much time left to live.
After a murder shatters the lives of three best friends, their decades-long bond is tested when an investigation reveals betrayals and shocking truths.
An actor returns home after a public meltdown. Partnering with his police detective friend, he tries to use his acting experience to solve real crimes.
Ki Moo-Hyeok, a lawyer with a high winning rate, only cares about money. Due to a murder case at a high school which he deals with, his reputation as a lawyer hits rock bottom. To regain his good name as a lawyer, he sneaks into the high school and work as a temporary teacher. He tries to reveal a secret which the students have, and gets involved with Teacher Ha So-Hyun, a P.E. teacher who loves her students. They then face the students'secret.
Maeng Se-na, a top star criminal lawyer who has been a fangirl for fifteen years, tries to prove her favorite idol’s innocence, who is suspected of murder.
A recalcitrant, delinquent teen girl meets a compassionate teacher, who inspires her to alter her path and become a street-savvy neurosurgeon.
Taejoong's life is torn apart when he's framed for a heinous crime and imprisoned. Discovering it was all orchestrated by someone on the outside, he embarks on a rage-fueled quest for revenge.
Determined to escape a dead-end life, a gifted high school student turns to a world of serious crime to ensure he can pay for college.
A misunderstood loner is drawn out of his shell after transferring to another high school, where he comes across new ordeals -- and first love.
Jang Byeong-tae is a small and weak boy living in Onyang in South Chungcheong Province. He's at the bottom of the school's social ladder and when he transfers to the neighboring Buyeo Agricultural High School, he faces an unexpected incident that becomes a turning point in his life.
Go Nam-soon, a young boy, constantly gets bullied by a group in his class. Later, one of his old rivals joins his school. Eventually, they are able to sort out their differences.
A mother who unfairly lost her young son, takes revenge against the perpetrator who has been forgiven by the law and heals her wounds.
While investigating a serial murder case, Detective Han Tae Joo gets into a catastrophic incident. When he wakes up, he finds himself transported back to 1988, appointed to work at a police station in a small city. Believing he is there for a reason, he tries to solve the case from the past in hopes of finding a way back to his life in 2018.
Waking from a fatal accident to find herself in the past, Han Yi-joo teams up with Seo Do-guk to take revenge on the family who never loved her.
After meeting an untimely demise in separate incidents, Cha Min and Go Se-yeon discover they’ve come back to life in new bodies they don’t recognize.
