#TWICE #SANA Birthday Wish

In the Korean comments

One commenter pinpoints Sullyoon’s reaction at the ending, writing in translation, “I wondered whether Seol Yoona was just barely keeping her face from turning red, but at the very end…” Another says her smile never leaves her face.

What the words mean

최애 선배님 (choe-ae seonbaenim, favorite senior artist) literally combines “favorite” with the respectful term “senior.” Here it means the senior performer Sullyoon likes most, framing the encounter as a junior artist meeting an especially admired predecessor. The wording is affectionate fan language while retaining the honorific respect of “senior.”