Kaito Kirishima is testing out his new camera, when something comes crashing from the sky, injuring him. The next morning he wakes up fine though, believing it was a dream, however during the day he experiences flashes from what happened and also vaguely remembers someone grabbing his hand that night. A new girl at his school turns out to be her though he can't quite remember and in a strange twist she ends up living with him for the time being.