Seventeen is back to teasing us once more, this time with an obscure, mysterious image.

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Unlike the bright and colorful teaser images the group shared with us in the past day, this one seems to be shrouded in enigma, looking dark and foreboding. Fans can't even clearly make out the boys's faces, as they are veiled in shadow; their bodies are just dark masses hovering somewhere in space. This mysterious image is probably making fans question, just what will the concept of their comeback song, "Boys Be," be like?�

Guess we will have to wait until September 10 to find out!�