Epex

Epex (stylized in all caps) is a South Korean boy band formed and managed by C9 Entertainment. The group consists of eight members: Wish, Keum, Mu, A-Min, Baekseung, Ayden, Yewang, and Jeff. They debuted on June 8, 2021, with their first extended play (EP) Bipolar Pt.1: Prelude of Anxiety.

Name
The group's name, Epex, which stands for "Eight Apex". The meaning of the group is said to be when the gathering of eight youths reaches eight different apexes.

Pre-debut activities
Keum is a former contestant of Mnet's Produce X 101. As a 2-year old trainee representing C9 Entertainment, he was eliminated in the final episode and was ranked 17th place.

2021: Introduction, debut and Bipolar series
On March 1, 2021, C9 Entertainment announced would introduced member of their upcoming boy group under tentative name C9Rookies. The group's members were revealed individually starting on March 2 (in order: Keum, Baekseung, A-Min, MU, Yewang, Jeff, Wish and Ayden). On April 1, the group's logo and official name were revealed. A teaser titled "Prelude of Anxiety" was released on May 7. Their debut EP, Bipolar Pt.1: Prelude of Anxiety and its lead single "Lock Down", was released on June 8.

On September 24, 2021, a teaser titled "Prelude of Love" was released on the group's SNS accounts. Their second EP, Bipolar Pt.2: Prelude of Love and its lead single "Do 4 Me" was released on October 26.

2022–2023: Prelude of Anxiety and Love series
On March 15, 2022, a teaser titled "21st Century Boys" was released on the group's SNS accounts. Their third EP, ''Prelude of Anxiety Chapter 1. '21st Century Boys''' and its lead single "Anthem of Teen Spirit" was released on April 11.

On October 26, they released their fourth EP ''Prelude of Love Chapter 1. 'Puppy Love' , a sequel of their 2021 EP Bipolar Pt.2: Prelude of Love'', alongside the lead single "Hymn To Love". To commemorate of the EP release, they held an online showcase in the same day. The group also announced would be embarking on their first concert tour, "Eight Apex", kicking off in Seoul on November 19 & 20, following Osaka, Tokyo, Taipei, Kuala Lumpur and more cities would be announced later.

On March 27, 2023, the group release a logo animation for their upcoming fifth EP ''Prelude of Love Chapter 2. 'Growing Pains'' set to be released in April. Later that day, the timetable was released and confirmed that their fifth EP would be released on April 26. The EP detail were revealed which consists of four-track including the lead single "Sunshower". On April 26, the group held a showcase at Shinhan Play Square Live Hall in Mapo-gu, Seoul to commemorating the release of their fifth EP. Following the release of their fifth EP, the group announced to embarking their first fan-con "Sunshower" would held in June across four cities in Asia.

On September 4, 2023, the group announced schedule to be release their sixth EP ''Prelude of Anxiety Chapter 2. 'Can We Surrender?''' on October 4. Pre-orders for the EP surpassed 260,000 copies breaks their own reocrd. The sixth EP officially released on October 4 which contains four track including the lead single "Full Metal Jacket" and became the final chapter of Prelude of Anxiety series.

On November 17, it was announced that Epex would be embarking on their second concert "So We Are Not Anxious" in Seoul's Blue Square Mastercard Hall on December 16 and 17.

In December, Epex collaboration with Japanese boy group Fantastics from Exile Tribe for the song "Peppermint Yum".

2024–present: Youth series
In January 2024, Epex was announced to appearance on the Japanese variety show K-Pop House consecutive for two weeks. Later that, the group confirmed to performance "Peppermint Yum" in Japanese music program ''CDTV Live! Live!'' on January 22.

On February 26, 2024, the pre-release song "Graduation Day" for their upcoming first full-lengths album was released. On March 18, Epex confirmed their upcoming first full-lengths album Youth Chapter : Youth Days would release on April 9. The album contains eight tracks including the lead single "Youth2Youth", the coupling song "Breathe In Love" and the pre-released "Graduation Day". On April 22, the coupling song "Breathe In Love" also released music video that filmed in Taiwan. The album surpassed 231,247 copies in the first week after release.

On May 4, it was announced that Epex would held their second fan-con "Youth Days" in Seoul's KBS Arena on July 27 and 28. On June 7, the second fan-con also announced to be held in Osaka's Zepp Osaka Bayside on September 1 and in Tokyo's Zepp Haneda on September 3.

Members
Adapted from their official website.
 * Wish (위시)
 * Keum (금동현)
 * MU (뮤)
 * A-Min (아민)
 * Baekseung (백승)
 * Ayden (에이든)
 * Yewang (예왕)
 * Jeff (제프)

Headlining tours

 * Eight Apex (2022)
 * So We Are Not Anxious (2023–2024)

Fancon

 * Sunshower (2023)
 * Youth Days (2024)