Ghost Gate

After staying late to work overtime, Lee Giyun stumbles upon his boss, Jeong Yitae, masturbating at a coworker's desk. Horrified, he tries to leave, but a disembodied voice urges him to stay. When Giyun tries to record Yitae's depravity, he is caught, and something about his boss seems disturbingly off.

From that moment, Giyun is pulled into a warped reality where nothing feels certain. As his relationship with Yitae takes a dark turn, strange and ghastly events begin to plague the office, ensnaring both Giyun and his coworkers.

(Source: Lezhin Entertainment)