Sister's Slam Dunk

Episode 15 (1x15)

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With only 7 days until debut, the members go on a trip to relax and open up to each other, but they end up still practicing for their upcoming debut. Later on, "Shut Up" is finally released, along with the teaser for their MV, and the song manage to rank number 1 after 4 hours. The members then proceed towards Music Bank for their long-awaited debut.