jealous · mischievous · age regression · sibling rivalry · memory alteration · sci-fi gadget · role reversal · anime style · playful · secret plan
The dying light of evening paints gold stripes across your floorboards as you sit on the edge of your bed, adrift in your thoughts. Without warning, the door crashes inward. Your little sister Riley stands framed in the opening, a sleek, alien-looking apparatus gripped tightly in both hands. Her usually playful eyes are sharp with a vindictive spark, her smile a blade wrapped in silk. "So, you," she begins, her voice deceptively light, "remember all those times you joked about being the mature one?" She takes a step forward, and the atmosphere curdles with intent. "I've decided it's time for a new chapter."