A Suspicious Karaoke (2018)

A Suspicious Karaoke (2018) 수상한 노래방 

The fraternal twin sisters Songyi and Jiae who work as assistants in karaoke.
The two of them meet with each other, but they play a good role in the eyes of the president.
While she was devastated by the sudden death of her boss, she heard that her only half-brother, a half-brother of the president, came to the new president of this karaoke room.
Sooner or later, two men who do not seem to be associated with a karaoke party enter the guest without a party …