Son made his acting debut in 2006 in the educational drama,
Jump 2. In 2007, Son made his entertainment debut as the leader of Tachyon, a three-member
boyband, which first performed on the show
A-Live on
Channel V Korea. The first pop group launched by J&H Media, Tachyon released the debut single
Feel Your Breeze (a Korean
remake from the Japanese boyband
V6), then disbanded shortly after. After appearing in the
SBS drama
Coffee House, which ended in July 2010, Son entered military service. Upon his return in 2013, he returned to acting and rose to stardom for playing the character Haitai in campus drama
Reply 1994. He also gained popularity for appearing in reality shows, notably
Youth Over Flowers and
Three Meals a Day: Fishing Village. In July 2016, Son signed with
YG Entertainment. In 2017, he starred in the hit romance drama
Confession Couple. In 2019, he gained critical acclaim for his acting in
The Light in Your Eyes. In 2020, Son played the role of a successful novelist and scriptwriter in the Netflix drama,
Was It Love?. On June 30, 2021, Son signed with Think Entertainment. In June 2024, Son has decided not to renew his contract. In March 2025, Son established a new agency, 333. == Philanthropy ==