SF9 will be making their comeback soon with their 4th mini album, 'MAMMA MIA!'. Before the fans can get a chance to hear what their new album will sound like, the boys have dropped a teaser image for every single member. In the photos, they all made an upside-down heart gesture with their hands in place of the letter "A". Check out all the images below.

SF9's comeback will take place on February 26 KST.

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