Chaeyeon appeared on KBS 2TV’s ″The Seasons - Sung Si Kyung’s Ear Boyfriend″ and showed tears in response to Sung Si Kyung’s praise.

On the show, Chaeyeon introduced herself as ″solo singer Chaeyeon.″ After performing her hit song ″KNOCK″ as her first stage, Sung Si Kyung said, ″Honestly, I have been in this business for a long time, so I know when I see it. It’s definitely important that the song is famous and the person is well-known, but there are times when people enjoy the performance on stage. That was one of those stages. She was so good that I was drawn in by her charisma,″ praising Chaeyeon’s performance.

Chaeyeon said, ″If you say such nice things, I think I’m going to cry,″ and eventually shed tears. Sung Si Kyung, seeming flustered, said, ″No, no,″ and added, ″You did so well. It’s actually the first time I’ve seen the performance up close on stage. How talented and overflowing you are.″ Then Sung Si Kyung joked, ″Should I say something like poop to break the mood?″ which brought laughter to the scene.

Chaeyeon also expressed pride in Sung Si Kyung’s praise.