Confined Room

The protagonist collects other people's personal information and spies on them. He hacks into the account of a male student in the same class that he admires and uncovers unimaginable activities. Shocked, P sends an anonymous message to scare him, and then the male student suddenly disappears. A few days later, the protagonist wakes up locked in a room with only one computer... Will the protagonist be able to find the criminal who locked him in the room with only one computer and escape? (Source: Naver, translated)