Crime Fighting Love| Batman + Aikatsu Stars Crossover

Subaru, a young 15 year old boy holds a secret identity. During the day, he's a male idol, but by night, he's known as Batman.
Yume, a 15 year old girl, also holds a secret identity, she pretends to be a boy, Robin, Batman's companion. She has loved Batman for a long time, but doesn't have the courage to tell him, especially since he thinks she's a boy.
Secrets can't be kept forever, one day she gets found out, how will Batman react?