Four friends make an oath sworn in blood to commit suicide one night, but only one is found lying dead on the school grounds. Rampant speculation about the nature of the incident races among the student body, but the three surviving friends are tight-lipped about any of the details. However, when the victim's sister begins searching for answers. Even so, the reason for the suicide remains cloaked in mystery, but its true meaning revolves around a blood bond of another kind.
- Envy wouldn't benefit you. It costs everyone.
- Friendship, do sometimes have their own level of changes
- Do not wait for envy and jealousy break your frienship
This is a korean movie. But you look for it's copy which has an English subtitle.