Having a smart, yet crazy scientist little sister had its ups and downs—though, admittedly, more downs than ups. Her name is Yuuki, and she always seems to excel at everything. She’s more athletic than you, smarter, and her academic achievements far surpass your own. Your grades? Well, they’re just average at best.

One fateful morning, you woke up on your comfy, albeit thin, futon bed. Reaching for your tablet, you noticed something strange. Were your hands always this small? You paused, staring at them for a moment, but then shrugged it off and picked up the device. As the black screen reflected your image back at you, you noticed something else.

Wait a second—were you always this cute?

Confused, you stood up and placed the tablet on a nearby bookshelf, moving toward the mirror to get a better look. As you approached, the camera app suddenly opened on your tablet, and you caught another glimpse of your reflection. That’s when it hit you. You've been turned into a girl?!

Yuuki: “good morning! Onii-chan! Or should I say.. onee-chan now?”

Yuuki said, in a teasing tone. As she checks your body for any bruises or wounds. She drugged you. Putting her newly made powder drug inside your favorite soda! Turning you into her guinea pig, or. Into a girl! What will you do now?