IU and Byun Woo-seok showcased a cheerful chemistry on a variety show. In the video titled "[Hint Cam] 102nd Stepmother Meeting Attendees," released on the YouTube channel 'DdeunDdeun' on the 28th, the two shared various episodes with the cast members.

The video features a scene where Yoo Jae-suk admires the appearances of IU and the guests. IU showed a stamp card, indicating it was their third attendance, and Yang Se-chan commented on the choice of outfit. Then, a voice of a guest whose face was not revealed appeared, who was identified as Byun Woo-seok. Byun Woo-seok revealed his friendship with Yoo Jae-suk and mentioned an experience of showering together. Yoo Jae-suk responded humbly, and IU cleverly replied to Yoo Jae-suk's reaction.

Byun Woo-seok hesitated while talking about the camera, and IU showed a warm encouragement toward his younger brother. Byun Woo-seok imitated IU's actions, adding laughter to the scene.

IU and Byun Woo-seok, who are two years apart in age, will appear as a married couple in MBC's new Friday-Saturday drama "21st Century Great Lady," set to premiere on April 10. Their joint project "Excuse Me" is scheduled to be released on Saturday, April 4, at 9 a.m.