[talk] Bye, Summer' surprise release is still incredibly popular~

Suddenly released on YouTube at 7 o'clock, then released on music sites such as Melon and Spotify

Despite the surprise release, it reached number 9 on Melon's 'Top 100' chart in just 2 hours.

I think it's possible because it's really IU haha

I listened to it on my way to work and it gave me strength! Haha