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.

Hoshina Hikaru and three other Star Twinkle Precures gaze at the sky and end up warping into the Miracle Planet.

A vengeful teru teru bozu-like monster called Miden is stealing all of the Cures' magical powers and memories, turning them into helpless infants, barring Nagisa Misumi and Hana Nono. They must help the affected Cures to regain their abilities and fight off this new menance.

THE IDOLM@STER 765 MILLIONSTARS HOTCHPOTCH FESTIV@L!! was a two-day concert event that took place on October 7th and 8th, 2017. The concert featured a variety of songs and performers from 765 Production, such as ones from THE iDOLM@STER Million Live!, and took place at the Nippon Budokan Arena in Chiyoda Prefecture, Tokyo. Both days of the concert were filmed and released on Blu-ray in standard separate and limited edition boxset formats on November 21st, 2018.

The new OVA will feature the prequel short story "Snow Globe," which debuted as part of a light novel volume that bundled with a limited-edition version of the original PC game.