Eunkwang (Seo Eun Kwang)

은광    서 은광

BtoB

Eunkwang graduated from Dongshin University, majoring in Practical Music. 

Eunkwang debuted as the leader and main vocalist of Cube Entertainment's boy group BtoB on March 22, 2012, with the promotional single "Insane". Eunkwang also contributed as the lyricist in their fourth mini album, Beep Beep with the song "Melody" that is dedicated to their fans. 

In 2012, he released a digital single with singer Yoo Sung-eun entitled "Love Virus". A music video was uploaded to BtoB's official YouTube channel, featuring 4Minute's Nam Jihyun and singer Roh Ji-hoon.

In 2013, Eunkwang made his musical debut as "Albert" in the musical, "Monte Cristo". He gained good responses after his performance. He also joined the cast for musical, "Bachelor's Vegetable Store" as Chul Jin-yeok.

In 2014, he became a fixed cast on tvN's variety show 'SNL Korea 5'. He also released the song "Back In The Day" as part of the "Cube Voice Project Part 2".

In 2015, he sang the OST for the drama 'Mask with singer Miyu'. It was entitled "I Miss You." He also joined the studio panel in the MBC variety show, and virtual marriage program, 'We Got Married'.

In 2016 Eunkwang became a contestant on the variety show "King of Mask Singer', unfortunatly he was eliminated in the first round.

On September 19, 2017 Eunkwang made his solo debut through the "Piece of BtoB" project with his main title 'Only a Day Now' and 'Those Times'.

On August 7, 2018 (KST) it was announced that Eunkwang would leave on August 21st to fulfill his mandatory military duty as an active duty soldier. On April 7, 2020 Eunkwang was released from his military duty and held a live broadcast on Youtube.

On August 13, 2020, Eunkwang's appointment as a member of Cube Entertainment's board of directors was revealed through the company's 2020 half term report. He thereby became the first artist within Cube Entertainment to reach a director position within the agency.

On October 27, 2020, Cube announced that they have formed a unit called BtoB 4U consisting of Eunkwang, Minhyuk, Changsub and Peniel. The unit debuted on November 16, 2020 with their first mini-album, Inside and title track "Show Your Love".

On October 18, 2023 it was announced that BTOB would be separating from Cube Entertainment, it was also said that the group would be staying together