After hearing about the Southern Cross from Ryo, Hikaru decides to search for it, only for everyone's attention to turn towards another Star Color Pen on Kumarin, a planet with twice the gravity of Earth. Guided by a resident named Kumu, the girls are soon confronted by Kappard, Tenjou, and Eyeone, who have received a power boost from their leader, Darknest. As the Cures become overwhelemed by their opponent's new strength, losing both the new Star Color Pen and the Taurus Pen in the process, Fuwa and the others help them make an emergency retreat back to Earth, landing near where Fuyuki is searching.