STC Members Profile and Facts
STC (에스티씨) is a South Korean pre-debut boy group, consisting of 4 members: Donghyeon, Hyoya, Kangmin, and Sihyeon. On May 30, 2026, it was announced that LEE&KIM (Donghyeon and Hyoya) and 4SEASON members Kangmin and Sihyeon would form a new group together. They will begin promotions in Japan on June 19 with their STC : Start The Cycle live shows in Japan. Their debut date is currently unknown.
Group Name Meaning: It’s an abbreviation of Start The Cycle, which symbolizes their new beginning as a team.
Official Greeting: N/A
STC Official Fandom Name: N/A
Fandom Name Meaning: N/A
STC Official Color(s): N/A
STC Official Logo:
Official SNS:
Instagram: @s_t_c_official (KR)/ @stc_official.japan (JP)
STC Member Profiles:
Donghyeon
Stage Name: Donghyeon (동현)
Birth Name: Lee Dong Hyeon (이동현)
Position(s): N/A
Birthday: April 28, 1991
Zodiac Sign: Taurus
Chinese Zodiac Sign: Sheep
Height: 184 cm (6’0″)
Weight: 74 kg (163 lbs)
Blood Type: AB
MBTI Type: ENFP
Nationality: Korean
Instagram: @hello__0428
TikTok: @hello_donghyeon
X: @qweasd7777/ @TaeFung428
YouTube: 동현이에요/ Donghyeon Lee
Donghyeon Facts:
– He was born in Seoul, South Korea.
– He’s a former member of X-5 (2011-2012), LUKUS (2013-2024), and LEE&KIM (2024-2026).
– Donghyeon previously went by the stage name Taefung (태풍).
– He is a former FNC Entertainment trainee.
– He made his solo debut on June 29, 2020, with the single “if i could meet you again”.
– Donghyeon acted in the dramas Miss Ripley (2011), Spy Myeong Wol (2011), and the movie Bear Man (2023).
– He took part in writing and/ or producing of all of his solo releases, LEE&KIM‘s debut single “STARLIGHT” and “MY LOVE” by LU4US.
– He announced his marriage in May 2024.
– Education: Digital Seoul Culture Arts University (Department of Urban Environment Art, Bachelor’s degree)
– He has a pet dog named Choco (초코).
– He appeared in a commercial for a beverage brand.
– Donghyeon liked soccer from a young age and originally dreamed of becoming a professional soccer player, but had to give up that dream due to an injury. After watching High Kick!, he became interested in acting and naturally developed a dream of becoming a singer.
– He’s close with F.CUZ‘s LeeU, NTB‘s Zio and Sungwoong, and XENEX‘s Heeseok.
– His role model is Lee Minho.
– He used to practice Taekkyon (a traditional Korean martial art).
– His specialties are crawling and doing push-ups with his arms rotated, doing a voice impression of Park Younggyu, and an impression of a broken Ajaeng (traditional musical instrument).
Hyoya
Stage Name: Hyoya (효야)
Birth Name: Kim Jong Hyo (김종효)
Position(s): N/A
Birthday: June 5, 1992
Zodiac Sign: Gemini
Chinese Zodiac Sign: Monkey
Height: 178 cm (5’10”)
Weight: 67 kg (147 lbs)
Blood Type: AB
MBTI Type: N/A
Nationality: Korean
Instagram: @jonghyokim9
X: @jonghyokim9
YouTube: 효야 HYOYA
Hyoya Facts:
– He was born in Busan, South Korea.
– He’s a former member of LC9 (2013-2015), CIRCUS CRAZY (2015-2018), and LUKUS (2020-2024).
– Hyoya formerly went by the stage names J-Hyo (제이효) and Kizo (키조).
– He is a former FNC Entertainment trainee and trained with FTISLAND.
– He acted in the short drama Lies of Spring (2017).
– Hyoya took part in writing LEE&KIM‘s debut single “STARLIGHT” and “MY LOVE” by LU4US.
– He starred in the music video for “DIRTY” by MIRYO and “Call My Name” by Lee Yurim.
– He has already completed military service.
– Education: School of Performing Arts Seoul
– His specialties are playing the guitar, his strong vocals, rapping, and English skills.
Kangmin
Stage Name: Kangmin (강민)
Birth Name: Kang Min Seok (강민석)
Position(s): N/A
Birthday: October 21, 1996
Zodiac Sign: Libra
Chinese Zodiac Sign: Rat
Height: 174 cm (5’9″)
Weight: 54 kg (119 lbs)
Blood Type: AB
MBTI Type: INFJ
Nationality: Korean
Instagram: @illxlllolll
Kangmin Facts:
– He was born in Cheongju, North Chungcheong Province, South Korea.
– He’s a former member of A to Z (2017), VARSITY (2017-2020), and 4SEASON (2025-2026).
– Kangmin previously went by the stage names Xiweol (시월) and Minhyun (민현).
– He was formerly under DH Entertainment, AK Entertainment, and A+ Entertainment (2024-2026).
– He has completed his military service.
– Kangmin was featured on KOVI‘s single “Teach me”.
– He has his own brand called LOEWIX.
– He previously ran a reaction YouTube channel called Xiweol Show, which was later rebranded as PoP World and co-hosted with Sihyeon. The channel appears to have since been deleted.
– Education: High school (Graduated September 3, 2017), Korea University of Media Arts (Practical Music Department, graduated), Seoul Digital University (Computer Engineering Major, graduated)
– He has a brother.
– He was a performer at the M Countdown KPOP Concert in Thailand and appeared on MBC’s Sports Festival Program.
– Kangmin was awarded the Hanpi Cultural Gold Award.
– His specialties are playing the piano and guitar.
– His hobbies are running, singing, and soccer.
– Kangmin’s favorite singers are Park Hyoshin and BTOB‘s Sungjae.
– His favorite food is pizza, hamburgers, chicken, samgyeopsal (pork belly), and donkatsu.
– His ideal type is someone who is cute.
– Motto: “Let’s live carefully every day.”
Sihyeon
Stage Name: Sihyeon (시현)
Birth Name: Nam Kwon Hee (남권희)
Position(s): Maknae
Birthday: March 17, 1997
Zodiac Sign: Pisces
Chinese Zodiac Sign: Ox
Height: N/A
Weight: N/A
Blood Type: AB
MBTI Type: N/A
Nationality: Korean
Instagram: @xixxyeon_
Sihyeon Facts:
– He’s a former member of MOUNTAIN (2019-2020) and 4SEASON (2025-2026).
– He romanized his stage name as Sihyun during his time in 4SEASON.
– Sihyeon was formerly under DH Entertainment, AK Entertainment, and A+ Entertainment.
– He was awarded the Chungbuk Song Festival Grand Prize.
– He previously ran the reaction YouTube channel PoP World which he co-hosted with Kangmin, but the channel appears to have since been deleted.
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Who is your STC bias? Do you know more facts about them? Feel free to comment below!
