The YouTube series 'SELF-ON KODE' episode that aired on May 14 showcased a lively interaction between Choi Sooyoung and Ryeoun, offering viewers a glimpse into their personalities in a casual and enjoyable setting. The two stars engaged in a chat where they initially didn't know each other's identities, using only a messaging platform to communicate and relying on hints from their phone lock screens.

During the conversation, Choi Soo Young humorously mentioned a rumor related to her being a frequent traveler with high mileage status, playfully stating that a plane might not take off if a Million Miler like her doesn't board. Ryeoun teased her about her age and flying experience, leading to a light-hearted exchange. Music preferences were also discussed, with Choi Soo Young sharing her playlist choice, 'The Princess’s Rules,' which she listens to daily as a form of self-motivation. Their chat also touched on travel habits, with Choi Soo Young expressing her love for traveling despite doing less of it currently, prompting a playful comparison of their airline membership statuses.

Choi Soo Young's pride in her Million Miler status, an exclusive group recognized for accumulating over a million miles with Korean airlines, added a charming and jovial element to the conversation as the two stars shared their experiences and interests.