Kim Hyeon-soo

Kang In-ho (Gong Yoo) is the new arts teacher at the Benevolence Academy in the fictional city of Mujin, North Jeolla. He has a dark past - his wife was a high school student who committed suicide and his daughter is under the care of his mother. In-ho is hired to teach deaf and dumb students in school but he soon discovers a dark secret that lurks among the students and the faculty. (Wikipedia)

Eun-Hee has lost her memories of her high school students days. She begins to work as the vice-principal for the high school where she graduated from. Since she began to work there, she experiences unknown phantasms and auditory hallucinations. Meanwhile, Ha-Young is a victim of school bullying. But she is driven into a trouble maker at the school. One day, Ha-Young happens to go to a closed bathroom at the school and she hears a ghost’s sound. There she faces Eun-Hee. (asianwiki.com)

The story of a woman who strives to achieve her goal of entering high society by becoming the "queen" in the 100th floor penthouse in Gangnam, the pinnacle of success in her eyes. (imdb)

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. (imdb)