School is 'In' for PRISTIN's Rena and Xiyeon, as the first two members to tease for the girl group's comeback pose in school uniforms in old-style classrooms!

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In their 'Out' version teaser images released earlier, Rena and Siyeon posed on what seemed like a beach as if school were out for summer, while now, the girls are back in school, ready to learn.�

PRISTIN's 2nd mini album is set for release in full this August 23! Stay tuned for more of the members' individual teaser images, coming soon!