A creature born in an abandoned mattress travels around the country feasting on its victims’ vertebrae, struggling to break free from the bed, the mold, and its past.
| Actor | Role |
|---|---|
 Moon Hye-inGyeol | Gyeol |
| HHam Seok-youngYoon | Yoon |
| OOn Jeong-yeonYul | Yul |
| JJung Su-minJun | Jun |
 Kim Ye-naSol | Sol |
| HHong Seung-giNot listed | Not listed |
 Park Ji-hyeonCreature | Creature |
| GGoh-WooDelivery Cargo Worker 1 | Delivery Cargo Worker 1 |
| JJaeyiDelivery Cargo Worker 2 | Delivery Cargo Worker 2 |
 Jeon Go-woonOffice worker 1 | Office worker 1 |
| WWoo Moon-giOffice worker 2 | Office worker 2 |
 Lim Dae-hyungOffice worker 3 | Office worker 3 |
 Park Sye-young(Voice) Song Hummer | (Voice) Song Hummer |