After an accident Hinamori Aki is bound to the hospital for an unknown amount of time, so he can't work for his band.
Not wanting to tell his friends about all that he asks his twin sister to double him.
She first of course disagrees knowing it's a stupid idea since she's a pretty girl. But with a few changes here and there she IS looking like her brother. Not being able to say no to her cute brother she agreed.
But Aki didn't knew about Amu's weakness towards hot guys....