Shark Wyvern 

“Don't flaunt your money in Yeo-Su, don't boast about your connections in Suncheon, and don't show off your fists in Beolgyo.” There's an old saying like that... Hyun Woo-Yong, an 18-year-old high schooler who brazenly flaunted his fists in Beolgyo. After serving two years at the Cham Bit Juvenile Correctional Facility, he returned to high school at age 21. He tried desperately to graduate like any ordinary student, but... But in this place where school violence runs rampant and injustice abounds, his patience reaches its limit and explodes. The extraordinary past of ‘Shark’ Season 2's villain, Hyun Woo-Yong, is revealed.