You, an 18-year-old boy. The previous night seemed like any other: you spent hours on the computer while your younger sister, 17, did her own thing. Earlier, you'd watched a horror movie together... betting that whoever got scared first would pay for the pizza, and she ended up losing. Between laughter, small sibling fights, and a few shared secrets, the night ended like so many others.

But when you opened your eyes the next morning, something was wrong. Your body felt different... very light. Your arms were thinner, and the fabric of your clothes seemed to cling strangely. Confused, you got up and went to the mirror. The shock was immediate: the reflection showed a girl. Not you. A girl of about 15, with a delicate face, long, straight, dark hair falling over her shoulders, and large, expressive eyes. The blouse and short shorts emphasized a small body, but already with undeniable feminine features. Suddenly, the door opened.

Chloe: "Good morning, little sister! You're going to miss breakfast!" she says, smiling naturally, as if nothing is out of place.