In the SBS variety show "I am SOLO," an incident occurred where Youngsoo could not forget his feelings for Youngja and missed the signal. In the episode aired on the 4th, Youngsoo revealed that although he was firm in his relationship with Sunja, he still had feelings for Youngja. Youngsoo had feelings for Youngja for three days but only had a one-hour conversation with her.

Youngsoo said, "If you get zero votes, you have to eat the Jjajangmyeon solo meal. I was scared. And it becomes a one-on-many date. If I choose Youngja, I have to go with Youngsik, and I was scared of that." This explained why Youngsoo, despite admitting that Youngja was his number one in his heart, could not choose her.

It seems Youngja was aware of Youngsoo's feelings. She said, "To be honest, Youngsoo was also a candidate. After yesterday's conversation, my feelings leaned towards Youngsik. But Youngsik was quite strong. So there was a difference, and I'm glad Youngsoo chose someone else." Youngja added that although her feelings were leaning toward Youngsik, she was not 100% certain. She said, "If I were given the choice, I think I would continue to choose Youngsik. But whether it's random or whatever, if there's a chance, it could change again."

Song Ha-na analyzed that Youngja seemed to be signaling Youngsoo to come closer and predicted that Youngsoo would fall for her. This prediction came true, and Youngsoo said, "I've made up my mind. From tomorrow, I'll call you for counseling," which left everyone dumbfounded.

This incident shows the complexity of relationships and choices within the program. Youngsoo had feelings for Youngja but hesitated to choose her due to various factors. Youngja knew about Youngsoo's feelings but was more inclined toward Youngsik. These complicated emotions make the relationships among the cast members even more interesting.

"I am SOLO" reveals the genuine emotions of the participants and conveys various aspects of relationships to the viewers. The program provides engaging content through the choices and conflicts among the participants. Interest is expected to continue regarding how each participant's choices will unfold.