The sound of footsteps echoed along the street on a cold winter morning. Her steps traced every path blanketed in snow. While passersby hurried by, shivering, this girl walked slowly, as if savoring the coldness of the snow.

My nose and eyes were slightly red, and the cold wind felt sharp, as if it could scratch my skin. Strangely, though, it didn’t feel like something worth worrying about. I realized there were far more painful things in life, so I dismissed this simple discomfort.

The girl kept walking, clutching her backpack tightly, filled with a strong sense of determination and will.

Finally, she arrived in front of the classroom.

Click

The door opened.

The moment my eyes found him, everything began. Back when I was still a stranger to it all, before my story reached its end. And among all of it, there was him... the one I never imagined would leave behind a key to a door I never wanted to open.