Overview
Thud! Thud! Thud! The noise between rooms 401 and 501 has started! Eun Soo, an aspiring writer who is no different from a jobless person, begins to observe the owner of the house upstairs, questioning the noise between the floors that tormented her while searching for a subject for a contest. Ho Kyung, the man upstairs, also began to notice the existence of Eun Soo and eventually, Eun Soo faces a shocking truth... The noise that started today "Is the story that I only imagined real?’"
| Actor | Age then | Age now | |
|---|---|---|---|
 | 29 | 32 | |
 | 49 | 52 | |
 | 31 | 34 | |
 | - | - | |
 | 30 | 33 | |
 | 45 | 47 |