Lovelyz have dropped a teaser video for their 'Unforgettable' comeback.

The 'Unforgettable: Pieces of Memories' teaser above reveals a preview of Lovelyz' comeback as well as a puzzle being put together. Lovelyz' seventh mini album 'Unforgettable' is set to drop on September 1 KST.

Watch Lovelyz' teaser above, and check out their concept photos here and here if you missed them.