On May 15, ZE:A's official Twitter uploaded an interesting and mysterious black-and-white image without a caption or explanation.

Perhaps this is a teaser image for the boys' upcoming activities?  The image just features one hand sticking out of the darkness as if reaching for something.  The word at the top only states, "zogo."  

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It's yet unclear what this image is supposed to represent, so stay tuned for updates from the boys!