Son became a star in Korea, similarly as Olympic champion Kim Yuna, after grabbing a medal in individual all-around at the 2010 Asian Games in Guangzhou, becoming the first South Korean rhythmic gymnast to do so.

[12] At the Grand Prix series held in February 2012, she tied for the 18th place[13] with Wong Poh San with the total score of 100.850 in the individual overall and third in the Hoop final.

[17] Son finished 4th in all-around at the 2013 Sofia World Cup and shared the bronze medal in hoop with Ukrainian Ganna Rizatdinova.

She competed at the 2013 Summer Universiade where she finished 6th in all-around, she qualified to 3 event finals where she won silver in ball, placed 5th in clubs and 7th in ribbon.

At the 2013 World Cup series in St.Petersburg, Russia, Son finished 4th in all-around and in the event finals won silver in hoop, bronze in ribbon, placed 4th in clubs and ball.

At the 2013 World Championships in Kyiv, Ukraine, Son qualified to 3 event finals where she finished 7th in hoop, ball and 6th in clubs behind Deng Senyue.

In 2014, Son began her season competing at the 2014 Moscow Grand Prix finishing 6th in the all-around, at the event finals she won bronze medals in ribbon, clubs and hoop.

Son then competed at the 2014 Stuttgart World Cup finishing 7th in All-around, she qualified to 3 event finals: she took silver in ribbon, placed 8th in ball and 5th in hoop.

She scored a total of 71.200 points ahead of Melitina Staniouta (silver) and World Cup debutante Dina Averina (bronze).

In the event finals, Son became the first Asian and Korean rhythmic gymnast to win 3 gold medals (in ball, clubs, ribbon) and won bronze in hoop behind Staniouta and Maria Titova.

[19] She followed with her next event at the 2014 Pesaro World Cup, where Son finished 5th in all-around and won silver in clubs and bronze in ball final.

On 30 May – 1 June, Son competed at the 2014 Minsk World Cup and finished 10th in all-around, she qualified to 3 event finals and won a silver in hoop, bronze in ribbon.

On 5–7 September, competing at the 2014 World Cup series in Kazan, Russia, Son finished 5th in the all-around behind Katsiaryna Halkina with a total of 69.750 points.

On 27–29 March, Son returned to competition at the 2015 Lisboa World Cup finishing 4th in the all-around, in event finals: she won silver in hoop, placed 5th (clubs, ball) and 6th (ribbon).

On 22–24 May, Son returned to competition at the 2015 Tashkent World Cup where she won the all-around bronze behind Russians Margarita Mamun (gold) and Aleksandra Soldatova (silver).

Her next competition was at the 2015 Summer Universiade in Gwangju, Korea were Son won the all-around gold ahead of Ganna Rizatdinova (silver) and Melitina Staniouta (bronze).

On 9–13 September, Son competed at the 2015 World Championships in Stuttgart, she qualified to all 4 apparatus finals finishing 5th in Hoop, 4th in Ball, 8th in Clubs and 5th in Ribbon.

[28] On 17–20 March, Son then competed at the 2016 Lisboa World Cup where she finished 4th in the all-around behind Neta Rivkin, in apparatus finals: she won bronze in hoop, ball, placed 4th in clubs and 7th in ribbon.

On 8–10 July, Son then finished 4th in the all-around at the 2016 Kazan World Cup with a total of 74.900 points - updating her Personal Best, she qualified to all apparatus finals taking silver in hoop, bronze in ribbon, 4th in ball and clubs.

[43][44] Son appeared on two episodes 109 and 110 of SBS's variety show "Running Man" hosted by the "Nation's MC" Yoo Jae-suk together with swimmer Park Tae-hwan.