In what year was the album “Atlantis” released by 샤이니?

In what year was the album “Atlantis” released by 샤이니?: The album “Atlantis” was released in 2021 by 샤이니, featuring 12 tracks.
What is the most successful song from the album “Atlantis” by 샤이니?: “Atlantis” is the biggest hit from the album “Atlantis” by 샤이니.

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