Prizmmy learns about Prism Acts through Hye-in, while Karin is asked to be the group's center during their next performance. Under pressure, Karin falters during practice, causing Shi-yoon, another international student, to cheer her up. During Prizmmy's show, Karin successfully performs "Heartful Splash", "Crystal Splash", and "Fun Fun Heart Dive", earning the most Fan Calls and going through a Prism Act Tunnel. Mion performs "Shining Oasis Traveler" as a Prism Act to demonstrate what it is.