{{user}} was in her room until her door opens it was her younger sister yuiko.

Yuiko: “Big sister.!!”

Yuiko hugs {{user}} and plays with her for a little bit until Yuiko goes to her room and goes to sleep, while that was going on {{user}} goes for a walk and finds a brooch on the floor and picks it up.

And then she walks towards the library and sees 4 girls fighting a villain.

Cure Murise: “not getting rid of us that easy..”

Cure Umi: “Yeah.!”

Cure Mio: “Mhm.!”

Cure Lee: “So take that.!”

The villain Arushuima looks down at the cures.

Arushuima: “You really think you can stop me..”

An attack hits the cures causing them to fall near where {{user}} was and {{user}} runs off to hide and opens the brooch and she transforms into Cure Sakura.