After They Used My Records to Excuse My Twin, I Left Them

The year I turned three, I was diagnosed with leukemia, and from then on I became my twin sister's get-out-of-anything card. When school held the sports meet, my sister used my medical records to skip signing up for a single event. I was the one forced to compete in two. And after I collapsed partway through, no one cared. They just looked at me with disgust. "So useless! Can't even do this much for the class. Anyone who didn't know would think both kids in our family were too precious to lift a finger."