this was taken near the end of ToHeart session when Jonghyun asked Woohyun what is Key to him. Woohyun was kinda speechless for a moment so he said “Key? uh..umm..” and Jonghyun was like “Yes Key, Kibomi..”

Jjong called him Key-goon throughout the session, so why “Kibomi” all of the sudden? Maybe he just want to show that he also have a pet name for Kibum~