Nightmare High is about the mysterious things that happen in a typical school. The students fall into a sweet but mysterious seduction in which their dreams happen as soon as they dream it.
- Drama: Nightmare High (English title) / Night Teacher (literal title)
- Revised romanization: Akmong Sunsaeng
- Hangul: 악몽선생
- Director: Hyun Moon-Sub
- Writer: Hyun Moon-Sub, Jung Yoo-Suk
- Network: Naver TV
- Episodes: 12
- Release Date: March 14 – March 31, 2016
The homeroom teacher of 2nd grade 3 class at Yosan Private High School had an accident and is hospitalised. Han Bong-Gu (Uhm Ki-Joon) now becomes the temporary 2nd grade 3 class homeroom teacher. He is mysterious figure. The teachers at the school know about him well, but he is not on the teaching staff list. Han Bong-Gu arouses the desires of each students and leads them into an illusory world.