[4] He made his official debut as a member and main vocalist of N.Flying on August 2 with the group's second mini album, The Real: N.Flying.

[5] Yoo released his first solo original soundtrack, entitled "Another Day", for the South Korean drama Criminal Minds on September 14.

[7] In February 2023, Yoo returned to the King of Masked Singer stage as "First Place Trophy", and this time he was successful in ascending the throne.

Yoo released the track "Still Love You" as part of his collaboration with Lee Hong-gi of F.T.

[8] In 2019, Yoo made his solo appearance in KBS's music competition program, Immortal Songs 2 in 2019.