Yu-wol-ui il-gi

I am shocked how people can rate this so poorly. This movie amazingly presented the burning bulling issue which is ignored and doesn't come into light most of the time. The story follows the murder of a two students of the same school. After a while the doctor finds a capsule in their body where the name and date of the person is written. So,detectives started investigating the hand writing of the students and find out whose hand writing is this. Later find out he was badly bullied by all his fellow classmates But shockingly he is already dead already. Then who has been killing students? Who is behind all these killing and why?