Detective's Unity

Jiwon, a former delinquent, saves Haejin, an elementary school student who was being shaken down for money. In young Haejin's eyes, the delinquent Jiwon seems nothing but cool, but Jiwon begins to feel skeptical about their own life as a delinquent. Nine years later, young Haejin enters high school as a troublemaker and comes face-to-face with Jiwon, who has become a teacher...