The Perfect Education/Kanzen-naru shiiku/禁室培欲

This movie was based on real event of a kidnapped girl, and it was a real example of Stockholm syndrome of kidnapped persons: they refused to blame the kidnappers,  on the contrary, they feel more and more friendly with the criminals.

Except for some R-level parts, the movie is good by aiding us to be aware of the other side of the society.