LE SSERAFIM's Kim Chae Won couldn't help but be ecstatic after seeing her idol leave a comment on one of her videos.

On March 3, Kim Chae Won uploaded IU's "Holssi" dance challenge on LE SSERAFIM's official Instagram. In the video, Kim Chae Won is seen dancing to the choreography of IU's newest track, "Holssi."

Soon after the video was uploaded, IU left a comment on the video saying, "Ms. Chae Won be my companion!" garnering much attention. In response, Kim Chae Won replied using her own Instagram account, "I love you."

What's noteworthy is that IU was aware of Kim Chae Won's "Become My Companion meme," which was from LE SSERAFIM's first solo concert when Kim Chae Won made an adorable mistake. Instead of the usual catchphrase, "FEARNOT, Be my companion!" Kim Chae Won fumbled her words to say "FEARNOT, Be My Cccc," and suddenly turned around without finishing her sentence since the song began.

After Kim Chae Won saw IU's comment, she also uploaded a response video where she was seen ecstatic and speechless.

Fans and netizens commented, "She's become a successful fan," "I'm so envious of her," "I've never seen Kim Chae Won being like that," "She's so cute," "She's really happy," "Her ears are red and she can't even breath. She's one lucky fan," "This is so adorable," "This is what true happiness is," and "I would be so happy too. She posted the video hoping IU would see it but then her role model saw it and left a comment."