Seven O’Clock: Profile, Facts, Discography, etc.

Korean Area

Everything You Need To Know About the South Korean Rookie and Talented Boy Group Seven O’Clock

Seven O’Clock or 7 O’Clock is a newly formed rookie group from Staro Entertainment. This group has 6 members, namely A-Day, Vaan, Hyun, Young Hoon, Jeong Gu, and Tae Young. The group name was chosen because they “want to give happiness to everyone with their songs from the beginning of their day (7 a.m.) to the end of the day (7 p.m.).” The agency also added that the members wanted their music to heal people’s hearts and give them hope.

A-Day who became the leader of this group played an active role in creating the song “Time Machine” that was also included in their first mini-album.

Profile and Facts About Seven O’Clock Members

Korean Area


Birth Name Song Yeon-geun (MIXNINE vLive) but he legally changed it to Song Han-Gyeom (송한겸)
Stage Name Hangyeom (한겸) [formerly known as A-Day (에이데이)]
Date and Place of Birth July 17th, 1996, South Korea
Height 176 cm (5’9″)
Weight 62 kg
Zodiac Sign  Cancer
Position In Group Leader, Main Rapper, Main Dancer, Vocalist, Visual
Social Media Instagram: @songhangyeom_aday.soc


  • His hobbies are dancing, rapping, composing, and writing lyrics.
  • A-Day is a good dancer.
  • According to the members he has a reverse charm (on stage he looks cool but inside he feels a little bit lonely)
  • If A-Day has a sister, he would introduce JeongGyu to her. (After School Club)
  • When A-Day was in high school, he was the leader of a band and a dance club. He also was the main vocal of the band, even though he is a rapper now. (Pops in Seoul)
  • A-Day participated in MixNine and passed the audition. (He ended up being ranked 6th which gave him an opportunity to debut)
  • Hangyeom wrote the lyrics for “Searchlight.”


Birth Name Park Sung-Hyun (박성현)
Stage Name Hyun (현)
Date and Place of Birth August 25th, 1997, Suwon, Gyeonggi-do, South Korea
Height 176 cm (5’9″)
Weight 58 kg  (128 lbs)
Zodiac Sign  Virgo
Position In Group Vocalist
Social Media Instagram: @hyun.soc


  • Hyun’s hometown is Suwon, Gyeonggi-do, South Korea.
  • His hobby is cooking.
  • His specialty is singing.
  • Hyun hates vegetables.
  • Hyun is the best cook. (After School Club)
  • He is in charge of “silliness” in the group.
  • Hyun participated in MixNine but didn’t pass the audition.

Young Hoon

Birth Name Kim Young-Hoon (김영훈)
Stage Name 2soul [formerly known as YoungHoon (영훈)]
Date and Place of Birth September 10th, 1997, South Korea
Height 172 cm (5’8″)
Weight 55 kg (121 lbs)
Zodiac Sign  Virgo
Position In Group Main Vocalist
Social Media Instagram: @2soul.soc


  • His hobby is watching movies.
  • His specialty is singing.
  • He is in charge of ‘cuteness’ in the group; he has always been told that he is filled with lovely or aegyo-like charm.
  • Younghoon’s favorite sport is baseball. (After School Club)
  • Younghoon participated in MixNine but didn’t pass the audition.

Jeong Gyu

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Birth Name Lim Jeong-Gyu (임정규)
Stage Name Jeong Gyu (정규)
Date and Place of Birth November 5th, 1997, South Korea
Height 181 cm (5’11″)
Weight 62 kg (137 lbs)
Zodiac Sign  Scorpio
Position In Group Lead Vocalist, Sub-Rapper
Social Media Instagram: @jeonggyu.soc


  • His hobby is to watch and comment on soccer and baseball matches.
  • He can play the guitar.
  • He is in charge of ‘energy’ in the group.
  • JeongGyu takes the longest showers. (After School Club)
  • He eats the most among all the members. (After School Club)
  • He prefers Americano over Cappucino. (After School Club)
  • Jeonggyu is a sleepwalker. (Pops in Seoul)
  • Jeonggyu has a short torso. He’s the second tallest, but when he sits he looks like the smallest among the members. (Pops in Seoul)
  • Jeonggyu participated in MixNine but didn’t pass the audition.

Tae Young

Birth Name Kim Tae-Young (김태영)
Stage Name Tae Young (태영)
Date and Place of Birth June 18th, 1999, South Korea
Height 178 cm (5’10″)
Weight 60 kg (132 lbs)
Zodiac Sign  Gemini
Position In Group Lead Vocalist, Maknae
Social Media Instagram: @taeyoung.soc


  • His hobby is beatboxing.
  • He can play the drums.
  • Taeyoung’s favorite color is pink.
  • Taeyoung can’t live without a mirror. (After School Club)
  • He is nicknamed “shoulder-gangster” (he has the broadest shoulders in the group).
  • Taeyoung prefers sweet over salty food. (After School Club)
  • Taeyoung participated in MixNine but didn’t pass the audition.


Stage Name Andy (앤디)
Date of Birth October 6th, 1994
Nationality Hong Kong
Position In Group Vocalist


  • He was added to the group in January 2019.
  • Andy is from Hong Kong.
  • He speaks Korean, Chinese, and English.

Former Member: Vaan

Birth Name Kim Sang-Won (김상원)
Stage Name Vaan (반)
Date of Birth October 10th, 1996
Height 181 cm (5’11”)
Weight 66 kg (145 lbs)
Zodiac Sign  Libra
Position In Group Main Rapper
Social Media Instagram: @login_vxxn


  • His hobbies are composing, watching movies, and playing football.
  • He can play the piano.
  • Vaan is a good swimmer.
  • Vaan is kinda known to be a T.O.P look-alike.
  • Vaan participated in MixNine and passed the audition. (He ended up ranked 31st)
  • On September 19th, 2018 it was announced that Vaan left this group.

Seven O’Clock’s Official Debut

One Stop K-Pop

Seven O’Clock debuted on March 16th, 2017, under Staro Entertainment. Seven O’Clock made their official debut by releasing the first mini-album titled Butterfly Effect. This first mini-album contains five songs with the lead single “ECHO.”

Seven O’Clock, at the time, consisted of leader A-Day, Vaan, Hyun, Young Hoon, Jung Gyu, and Tae Young. This group is a group made by STARO Entertainment, where the group’s name was chosen because they planned to give happiness, hope and steal the hearts of many people with their songs from 7 a.m. to 7 p.m.

Before their debut, Seven O’Clock had already captured fans’ attention through their social media accounts, including the introductory videos of each person via their official YouTube account. While their mini-album, Butterfly Effect contains a total of five songs including an instrumental song. Their leading debut song has been described as a tropical house song. A-Day, the leader, also participated in the album production, which showed his ability as a songwriter with the song “Time Machine.”

Seven O’Clock’s Discography


Extended plays

Title Album details
Butterfly Effect
  • Release Date: March 16th, 2017
  • Label: Staro Entertainment, KDH Entertainment, Genie Music
  • Formats: CD, digital download
  1. Echo (시계바늘)
  2. Time Machine
  3. Halley
  4. Yesterday (그래 그랬어)
  • Release Date: October 6th, 2018
  • Label: Forest Network, Loen Entertainment
  • Formats: CD, digital download


Title Year Album
“Echo” (시계바늘) 2017 Butterfly Effect

Music Video

Vaan Leaves the Group, Seven O’Clock Announces Signing With a New Agency

Kpop Chart

On September 19th, 2018, the Forest Network entertainment label revealed that they had signed an exclusive contract with the rookie group, Seven O’Clock.

The label stated, “Former member of Seven O’Clock, Vaan, has decided to leave the group, and the group will regroup with a lineup of 5 members, with A-Day, Hyun, Younghoon, Junggyu, and Taeyoung. The label and members tried to convince Vaan [to stay] many times, but in the end, we decided to respect the wishes of individuals to stop participating in group activities, and the group would regroup. That is not an easy decision for the members. We ask for support and encouragement to Seven O’Clock and Vaan.”

Seven O’Clock, debuting under Staro Entertainment in 2017, will now be managed under the auspices of a new agency. This group plans to soon have their comeback as a group of 5 members.

Seven O’Clock’s Instagram

Seven O’Clock Announce Their Comeback in February This Year With a New Member!


Seven O’Clock will be back on the stage, on February 21st, 2019, introducing a new member, Andy!

Seven O’Clock’s comeback will be the first as a group of six members, with their new member, Andy. Previously, in September 2018, Vaan left the group, and Seven O’Clock briefly promoted their group as five members.

Forest Network, as the agency overseeing Seven O’Clock said, “They will release a new single on February 18th; Seven O’Clock will officially start the promotion. They will return with a different style from what was previously released “Nothing Better,” so hope you guys look forward to it.”

Seven O’Clock debuted in 2017 with the Butterfly Effect.

Seven O’Clock Announce Their Official Colors!


Rookie Boy Group Seven O’Clock has announced the official colors for their fan club R.O.S.e!

On February 8th, the Group shared announcements on their official social media accounts and explained the reasons behind the color choices. Colors will have a total of three colors for Seven O’Clock, with gradations formed when three colors blend together.


According to the explanation, “Each color represents our desire to fill every moment with happiness, from 7 a.m., when we start our day, until the end of the day at 7 p.m., and all the moments we share with R.O.S.e.”

Seven O’Clock officially made their comeback in February, again as a six-member group, introducing the new member Andy.