How do inmates in a correctional facility satisfy their sexual desires? A full-fledged confined-space erotic story depicting the precarious prison life of prison guards and inmates involved in sex penpals begins!
| Actor | Role |
|---|---|
 Lee Chae-damNot listed | Not listed |
 Jin Seo-yoolNot listed | Not listed |
 Son Ye-haNot listed | Not listed |
 Lee Ye-jinNot listed | Not listed |
 Min Do-yoonNot listed | Not listed |