The story begins when the protagonist Hikaru meets aliens Lala, Prunce, and Fuwa while watching the night sky. She learns of the Star Palace, where the 12 Star Princesses of the constellations kept the balance of the universe until they were attacked. Lala is searching for the legendary Precure warriors to help find the 12 scattered Princess Star Color Pens and revive the princesses. When Fuwa is captured by an enemy, Hikaru wishes to save Fuwa, and a Star Color Pendent and a Star Color Pen appear to allow her to transform into Cure Star. From then on she works to collect the pens and raise Fuwa, who is the key to reviving the princesses.

Seven years after humanity was devastated by a major disaster, a beacon of science and prosperity rises in Kamitsubaki City. But lurking in its shadows are Tesseractor, monsters born from human darkness. Only the Witchling, five girls with voices that wield magic, stand against them. With every note, they fight, not just to protect the peace of the city, but to heal a broken world. (Source: Crunchyroll)

Second season of Kankin Kuiki Level X.