Hide and Seek
숨바꼭질 (original)
Starring Son Hyeon-ju, Son Hyun-joo, Moon Jeong-hee, Jeon Mi-seon, Kim Won-hae, Jeong Joon-won, Kim Su-an, Kim Ji-young, Lee Joon-hyuk, Lee Jun-hyeok
It's a thriller and documentary movie, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Italy.