Melancholia

Melancholia tells the story of Ji Yoon-soo (Im Soo-jung), a mathematics teacher at the prestigious private Ahseong High School, which is also a hotbed of corruption. She is good-natured on the outside, but gets very tenacious and stubborn once she makes up her mind about something. Extremely passionate about math, she is a teacher who encourages her students to find their own answers. At the school, she meets Baek Seung-yoo (Lee Do-hyun), a troubled student who is at the bottom of his class. She notices his potential in math, and with her attention and interactions with him, Seung-yoo's grades rise and he becomes number one in the class. Baek Seung-yoo himself is a student who rarely talks, but he likes to take pictures with his camera. He has no friends at school, but he has a shocking past. When he was a child, he won many Mathematical Olympiads. When he was 10 years old, he entered the Massachusetts Institute of Technology in the United States, but he suddenly disappeared at the age of 12. Yoon-soo never knew that her attention and interactions with Seung-yoo would create rumors of a teacher-student sexual scandal among other students and parents, which results in her being fired from her job. Four years later, Yoon-soo and Seung-yoo meet again. Now both as adults, they unite to expose the corruption at Ahseong High School, and to regain Yoon-soo's reputation as a teacher.