So Nyeongyeongchal

In 20XX, due to the increasingly heinous misdeeds of juveniles, the government creates a special team called the Juvenile Police, which recruits students as police officers. Do Jae-Ha, an ordinary boy with nothing special to do, loses his best friend, who was a juvenile police officer, in an accident and enters the path of a juvenile police officer.

(Source: Naver, translated)