Mondai no Nai Watashitachi (2004)

Mio Sasaoka hears of a middle school student that was a victim of bullying and then committed suicide. Mio thinks the girl should have confronted her tormentors rather than committing suicide. Mio herself is the leader of a group of students at her school. She is a bully. Her main target is Maria Shiozaki who is weak. Mio pushes her into the swimming pool and scribbles on her book, justifying her actions because Maria is disagreeable.

Unfortunately the movie Mondai no Nai Watashitachi is not yet available on HBO Max.