The socially anxious Sayuri has long had a crush on a boy who takes the same train as her every morning. One day, on impulse, she finally tries to talk to him, but he only ends up mistaking her for a mute girl. She knows she should correct him, and she doesn't want to lie to him, but it's so much easier to go along with it...

She begins to wonder... what if she really couldn't speak?

Her wish may be fulfilled by a certain urban legend—the Malingerer Room, a shop that sells one-day illness and incapacity.