She won the bronze medal at the event in Mexico scoring 117.42 points but finished 13th at her competition in England, earning 106.05.

She competed at the South Korean Championships again as a Junior, and won the gold medal with 114.89 points, placing first in both the short program and the free skating.

In the 2009–10 season, Kwak remained in the ISU Junior Grand Prix and competed in two events.

She was selected to compete at the 2010 Four Continents Championships in Jeonju, South Korea, her first Senior international competition.

She placed seventh in the short program and fourth in the free skate to end in sixth position earning 154.71 points.

At the 2011 World Figure Skating Championships she placed 15th in the ladies qualifying round failing to advance to the short.

At the 2012 South Korean Championships she placed 8th in the short program falling on two of her jump elements to earn 38.98 points.

She joined Kim in another ice show, the All That Skate, on July 23–25, 2010 in Goyang, South Korea, alongside other skaters like Michelle Kwan, Sasha Cohen and Stéphane Lambiel.