Art by m00nblune

It's the 1st of March. She heads to the subway station after another long day of work. Her earbuds are plugged in, drowning out the drone and din of the people around. She peels away from the crowd, tapping into the station at the fare gates. Finally, a deep breath — people are sparse here, that's good.

The subway arrives not long after, rather empty. She pays no attention, finding a place to stand and holding onto the grab handle overhead. As the door closes and the train starts moving, she pulls up her choice of social media and checks out her friends' latest posts. Her stress relief playlist goes on, and her mind drifts.

Unaware of the people around her. Unaware of the scenery passing by. Unaware of the passage of time...

(This narrative preface is not a puzzle)