There's no angry mom in Gokusen but there is some organized crime involved but more like Han Gong Ju-style, there is a righteous teacher, a stupid vice principal and unruly students, but also some rather preachy dialogues/monologues. Regardless, both are a fun watch with darker themes (Angry Mom is upfront with it, if not a bit gory at times while Gokusen is more careful, mostly if you care to think hard and long enough since Gokusen's premise relies more on comedy) as the students mature and grow through their actions.
it shares the same justice fantasy where an ordinary-looking authority figure secretly possesses extraordinary abilities. much like teach you a lesson, the protagonist enters school environments dominated by violence and intimidation, protecting students and taking on threats that conventional teachers couldn't handle. the tone is lighter and more comedic, but the feeling of "the bullies finally met someone stronger" remains almost exactly the same.
