The Tutor

When Belle, Got, and Pai hear an eerie rumor about "enrolling with a ghost", a ritual said to guarantee passing grades in every subject, they decide to investigate. Desperate to escape the crushing academic pressure, they venture into an abandoned classroom at a prestigious tutoring institute.
But their hope turns into horror as they unwittingly open the door to a cursed lesson—a class that refuses to let them go. The ghostly instructor relentlessly haunts and teaches them, trapping them in an endless nightmare of learning.
Belle falls under the sinister spirit’s control, forced into brutal, inescapable study sessions. His younger brother, Best, begins to sense something is terribly wrong. Teaming up with Siu, the one who first told them the legend, Best delves deeper into the institute’s dark secrets. However, the closer they get to the truth, the more they become entangled in the terrifying lesson—one that might never let them graduate... alive.
(Source: SFCinemaCity.com)