Derailed (2016)

both Extracurricular and Derailed are similar in plot. both are about teenagers committing "crimes" that get over their heads

The premise of both movies are different but Derailed is just as much of a dark thriller with a total eye candy male lead. But it's definitely darker on the whole.

The main lead isn't a gangster but more like a homeless thug who does petty crimes and is also involved in crimes with other gangs but the reason I'm mentioning this one is because of the same feel of dark and gritty underbelly of the city feel of both movies. In Derailed Choi Minho's character loves the girl desperately and she gets taken.