13 Beloved

13 Beloved is a 2006 Thai horror comedy film written and directed by Chukiat Sakveerakul and starring Krissada Sukosol Clapp as a man who is led through progressively challenging, degrading, and dangerous stunts by mysterious callers from an underground reality game show, Achita Sikamana and Sarunyoo Wongkrachang appear in supporting role, is adapted from the "13 Quiz Show" short story in the My Mania comic-book series by Eakasit Thairaat. It was the second feature-length film for Chukiat, who previously directed the horror film Pisaj.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.