[2] In December 2013, Yeo One participated in a special dance performance alongside future bandmates Hui, E'Dawn, and Kino at the KBS Song Festival.

[9] During the show's filming, he made his acting debut with a lead role in web drama Spark as the leader of an idol group, Dexter.

The show resumed filming in June but, due to scheduling conflicts, Yeo One was replaced by Shin Won-ho of Cross Gene.

[20] Later that year, he starred in the King Sejong Institute Foundation web series There is an Idol in my Living Room as a fictionalized version of himself.

[21] On October 9, 2023, it was announced that Yeo One had left Cube Entertainment alongside fellow Pentagon members Yan An, Yuto, Kino, and Wooseok.

[23] In January 2024, Yeo One joined the reality music competition show Build Up: Vocal Boy Group Survival.