High school Seniors Mok-Lyeon and Byung-Hee have their first sexual intercourse at a cramped and non-soundproof study-room at goshiwon. While Byung-Hee is out buying snacks for Mok-Lyeon, the neighboring man enters the room where Mok-Lyeon is alone...
| Actor | Role |
|---|---|
 Kang Jin-ahMok-ryeon | Mok-ryeon |
| LLim Young-wooByeong-hee | Byeong-hee |
 Kim Jae-rokThe man next door | The man next door |