Rule 101

The story, without spoilers

A wealthy professor consumed by sex addiction. A group of students drawn into a forbidden ethical abyss. When a dangerous game of temptation and taboo takes an unexpected turn — a student mysteriously disappears, and everyone believes their secrets will be buried forever. But the arrival of a new face becomes the first domino to fall. The carefully constructed lies, hidden desires, and painful truths of the past begin to unravel, exposing a world of deception and obsession one layer at a time.

Cast & characters

Jung Myeong-cheol

Cha Yun-ho / Lim Chi-won

Jung Hyun-woong

So Dong-wook

Kim Hyun-seo

Do Min-woo

Kwak Geon-hee

Park Seung-heon