As you might imagine, an innocent like Key gets into trouble pretty much the moment she arrives in Tokyo. Aimlessly wandering the streets, she's picked up by a 'photographer' for a 'model agency'... whose main line of business actually seems to be making adult videos. Luckily for her, she's rescued by a chance encounter with a childhood friend of hers, Sakura – who holds down three different part-time jobs but hasn't really decided what she wants to do with her life yet.
