2017–2019: Modelling and acting debut Hwang entered the entertainment industry in 2017 as a runway model. Reports state that he was once under
YG KPlus, a model management company owned by
YG Entertainment. In 2018, he made his acting debut in the
Naver TV web series
Why. He later signed a contract with the South Korean agency
KeyEast, a subsidiary of
SM Entertainment. In 2019, he played Seo Kyo-won in the web series
Freshman, and made his television debut with supporting role in the
KBS2 historical television series
The Tale of Nokdu.
2020–present: Rising popularity In 2020, Hwang gained recognition for his performance in the
JTBC fantasy series
18 Again, a remake of the 2009 American film
17 Again. He played Goo Ja-sung, a school bully and the counterpart character of Stan, who was portrayed by
Hunter Parrish in the original film. Hwang participed in the 2020 drama
tvN romantic-comedy series
True Beauty, based on the on-going
Webtoon of the same name. He portrayed Han Seo-jun, a secondary lead character. He contributed to the soundtrack of the series with the song "It Starts Today" (). Hwang also appeared in the
independent short film Swimming Bird alongside
Lee Ji-ah, which the film won at the 1st GwangMyeong Film Festival. In 2021, Hwang was cast in the fantasy musical series
The Sound of Magic, which was released globally on
Netflix in May 2022. He is also contributed to the soundtrack of the series with the song "I Mean It" (). On April 23, 2021, Keyeast announced that Hwang had signed a contract with Japan's agency Stream Media Corporation. Later, Hwang confirmed to star in the
SBS mystery legal drama
Why Her which premiered in June 2022 marking his first lead role on a terrestrial TV station. In 2023, he was cast as Kim San-ha, one of the main characters in drama
Family by Choice,
Korean remake of Chinese drama
Go Ahead in 2023. Drama was aired in 2024 at
JTBC channel and
OTT platforms. On January 2, 2024, it was reported that Hwang had signed an exclusive contract with KN Studio. In August 2024, JTBC confirmed Hwang as a special appearance character Heo In-gang to star in
Dear X drama. On November 24, 2025, Japanese agency J Harmony posted that it took over the operation of his Japan official
X account. ==Personal life==