Whispering Corridors 6: The Humming (2021)

Whispering Corridors 6: The Humming
Horror, Mystery
After being appointed as the vice-principal of her alma mater, Eun-hee becomes plagued by hallucinations. Branded a troublemaker by the teachers, Ha-young hears strange sounds coming from the school's dilapidated restroom.
Starring
Kim Seo-hyung, Kim Hyeon-soo, Choi Ri, BIBI, Seo Hye-won, Park Se-hyun, Lee Ji-won, Jang Won-hyung, Kwon Hae-hyo, Lee Joo-sil
Directed By
Lee Mi-young