In the month of December Hanae, a shy highschool girl, ends up breaking her hearing aid. With her single mother unable to afford a replacement, Hanae is forced to navigate the world in complete silence, but everything begins to change when she's paired with a classmate for a partner project.

As winter deepens and the new year draws near, the two grow closer in unexpected ways finding warmth and connection in each other amidst the cold of winter.