Sunday, March 10, 2019 
NU'EST has released a new teaser image for their upcoming track.
On March 10, the 5-member group NU'EST made another post with the hashtags "#SongTitle" and "#190315_6PM", with a phrase presumed to be a part of the lyrics. In the image, the sky projects the phrase: "It's a diary that's been filled with your thanks".
After unveiling their first image, NU'EST has continued to feed on fans' curiosities regarding the special track. This song will be officially released on March 15, the group's 7th anniversary since debut.
Stay tuned for updates!
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It definitely seems like the song is going to be a thank you song for fans and not just something to commemorate their anniversary.