Twilight Pretty Cure!

After the Smile! Pretty Cures defeated Pierrot, five diamonds in different colors were scattered across Azayaka Town, a town miles from Nanairogaoka. These diamonds were picked up by several different families, and have since evolved into human girls.

Eleven years later, a socially awkward young girl named Kibouteru Chise is starting her first day at Azayaka Hoseki Private Academy, a school that, to her surprise, her friend Kasai Homura attends. After school, she sees a group of younger children hassling a young dragon, who she then saves. The dragon is named Warun, and it's come from a kingdom that lives for wishes and dreams. However, this kingdom has been taken over by a demon king named Akumai, who, along with his three subordinates and two kids (his second-in-commands), have raided it and turned into an unhappy hellscape! Warun needs Chise's help in saving the kingdom, but... how will she achieve this? Not to mention she's the reincarnation of Bad End Happy, a girl who wants to make everyone in the world miserable!

With the power of a magical mirror that she found last night after making a wish - to save Gemmeland (and also to be a cosmetologist) - this being a Prism Mirror, as well as her determination to bring life back to the Kingdom, she transforms into the Pretty Cure of hope and stars, Cure Shimmer! After taking down a ghost-like monster (Yamishin), Chise is tasked with collecting several magic crystals called Arcus Charms, but she can't do it alone!

No, she has to find the other Cures, who are suspected to be Bad End reincarnations as well! How will she go about this...?

(Story from Quotev. Btw the pictures in the story are mine unless states otherwise)