Seong-hyeon, a college student, starts working as a private tutor for Ji-woo, a high school senior who is struggling with his grades. When Seong-hyeon visits the house, he meets Ji-woo's glamorous and lonely mother, Seo-young. While Ji-woo is uninterested in studying and sneaks out to meet his girlfriend, a dangerous attraction begins to grow between the young tutor and the lonely mother under the same roof.
| Actor | Role |
|---|---|
 Min Do-yoonSeong-hyeon (The Tutor) | Seong-hyeon (The Tutor) |
 Lee Eun-miSeo-young (The Mother) | Seo-young (The Mother) |
 Kim Ji-ahMin-jeong (The Girlfriend) | Min-jeong (The Girlfriend) |