Kim Doyul

On July 22, 2017, Doyul made his debut in the boy group 14U with the single album "VVV". In January 2019, Doyul departed from 14U due to personal reasons. On October 7, 2022, he was revealed as a member of the upcoming boy group D-ONE.

On August 29, 2023, it was announced that Doyul would be leaving the group due to personal reasons. On October 18, 2024, he was revealed as a contestant on JTBC's Project 7 but was unable to pass the survival round. On February 3, 2025, MOREDAY unveiled the first teaser for Doyul's debut solo single "Rainy Day", set to be released on February 8.