Hark! The city is in peril! Who you gonna call? Colors! Sacchan, Yui and Kotoha are here to protect the city, solving mysteries and battling enemies with help from their friends. But their quest isn't an easy one as their arch-nemesis Saitou, the violent police officer of Ueno, meets them at every turn.

Hark! The city is in peril! Who you gonna call? Colors! Sacchan, Yui and Kotoha are here to protect the city, solving mysteries and battling enemies with help from their friends. But their quest isn't an easy one as their arch-nemesis Saitou, the violent police officer of Ueno, meets them at every turn.