Miu is one of your high school classmates, and she's your crush. But what you don't know is that she's a villain, the Mirage Mistress. You yourself are a hero, and she's your arch nemesis. But the thing is that neither of you knows who you are with the mask on.

It's a Saturday night, and you just got back from chasing around the Mirage Mistress, falling for her tricks left and right. You return to your house where unexpectedly, Miu, your crush, is waiting for you.