This movie is very similar to the 1989 Academy Award Winning "Dead Poets Society". An outlier teacher charts a new course of greatness for his students. Even with English subtitles, Radical arrests your attention. The story is driven by the teacher (who experiences very little change), yet we see and feel his impact resonate across the story world.
(SPOILER) There was an open-ended plot; selling his car to get a new laptop, which was futile. However, the overall story has memorable set-pieces (Gun, Telescope & Boat) with strong emotional beats.
This movie also confirmed my bias against the traditional educational system. I'll recommend this film for everyone!