Twilight Movers Corporation: A group of part-time logistics agents in charge of delivering parcels mainly by railway, and other means in the dead of night. Among these merry band of part-timers is the clumsy yet ever-so bubbly Chamomile, nicknamed "Millie" by her peers. Many find her involvement in a part-time logistics job strange, because she's absolutely stinking rich! What would a princess like her be doing working a dead-end job like this?

The mysterious nature of her motives can only be matched by the Twilight Movers' resident loner: the diligent yet silent young man known as Concord. There's no telling what's running in his mind, beyond his cold, distant gaze that seemed to reflect a cry for help.

Millie and Concord are the Twilight Movers' best duo in deliveries! But between these two, there's one thing that they can't deliver: The correct words to express their feelings for each other! But when words fail, there are other ways for them to express their feelings... right?