As Riley spoke, her voice suddenly broke."But what did I do after that?"I lowered my gaze.My fingertips gradually grew cold.I remembered those things too, but I couldn't bring myself to recall those memories anymore.They hurt too much.Riley chuckled on the other end.It sounded broken."Casper, I was awful. I pushed you away with my own hands."I left you to suffer alone overseas. I even protected the person who got Mom killed."I've been too afraid to even sleep the past few days. Every time I close my eyes, I see Mom."She keeps asking me why I didn't protect you."My throat felt tense, but I still didn't speak.Riley fell silent for a moment. It sounded almost like she was begging when she spoke again."Casper, I know I don't deserve it, but could you please call me Sis one last time?"Just once. After that, I'll never bother you again."Suddenly, I saw a vision of Riley at fifteen.That year, when my classmates bullied me, she stormed into the classroom and s
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