The story is basic; The aliens are causing trouble and you must stop them by either freeing caged animals, defeating certain types of Chimera Animas, finding crystals or fighting the aliens themselves. You can play as all 5 Mew Mews. Your missions, how to complete them, and which aliens you fight and when, differs; depending on which character you choose. Most text is in Korean but figuring out how to play is very simple. Basic stats and abilities are labeled in English.