Bloody Reunion (Korean: 스승의 은혜; RR: Seuseungui Eunhye) (aka To Sir, with Love, My Teacher or Teacher's Mercy) is a 2006 South Korean horror film, and the feature film debut of director Im Dae-Woong.

They organize a class reunion with Ms. Park's past students: Se-Ho, Eun-Young, Dal-Bong, Sun-Hee, Myung-Ho, and Jung-Won.

The friendless and quiet Jung-Won, once ridiculed for defecating in class, stopped attending school when his mother was hit by a car.

Throughout the murders, flashbacks show the students laughing at Ms. Park's deformed son, who wore a bunny mask to hide his face.

All he finds is his mother's decaying corpse, women's clothing, and articles about the success of Ms. Park's ex-students, contrary to Mi-Ja's claims.

She fabricated the story for the police: she was the one who was poor and overweight, broke her leg after doing Ms. Park's punishment, and was mocked when her period stained her clothes in class.