Seungkwan

On April 19, 2015, Seungkwan was introduced through a video teaser as one of the 13 members of Pledis Entertainment's newest boy group SEVENTEEN. The group would be introduced through the reality program Seventeen Project – The Debut Mission. On May 26, he debuted with the group with their first mini album 17 Carat.

On March 21, 2018, DK, Hoshi and Seungkwan released their first digital single "Just Do It" as the unit BSS, which stands for "BooSeokSoon", a combination of their real names. On September 30, 2022, Seungkwan released a cover of ' "" through the Spotify Singles project titled "As It Was - Spotify Singles". On February 26, 2024, Seungkwan released his solo single, "Dandelion".