Silenced / 도가니

A teacher goes to Mujin to teach at a hearing-impaired school. These students are awfully indifferent and possess strange appearances and behaviour.
It is later revealed that 2 boys and 2 girls were regularly molested, raped and one had eventually died.

Extremely, extremely emotion-provoking and confronting, definitely not a waste of your time.
The videos are unlisted so here they are:

Part 1
Movie22.net.silenced_1.avi - YouTube

Part 2
Movie22.net.silenced_2.avi - YouTube

Part 3
Movie22.net.silenced_3.avi - YouTube

Part 4
Movie22.net.silenced_4.avi - YouTube

Part 5
Movie22.net.silenced_5.avi - YouTube

It's absolutely disgusting to see such careless people deal with this, people with high AUTHORITY too.
Pedophilia towards disabled and helpless people? Now that is not just pedophilia, that is literally taking advantage of your vulnerabilities to acquire satisfaction.

"Based on the novel "Dokani" written by Kong Ji-Young (published in 2009). The novel was inspired by a true incidents which occurred at a school for hearing-impaired persons in Gwangju, South Korea."
Source: http/asianwiki.com/Silenced_(Korean_Movie)