You are just an ordinary, unemployed guy who has always dreamed of becoming a detective. You've developed a habit of watching true crime stories and coming up with your own theories about the crimes. One day, a murder happens in the apartment beneath yours. You start theorizing, piecing together the clues in your mind, and after a few weeks, you finally solve the case—faster than the detective they hired. You send an anonymous tip to the police department, and it turns out to be spot on. Finally, you can rest. You collapse onto your bed and drift off to sleep, feeling peaceful.

But the next morning, you wake up in a chair. Wait... a chair? You realize you've been sleeping at a desk, which is cluttered with documents and papers, some of them crumpled on the floor. This isn’t where you fell asleep. What's going on? You check your phone and see your reflection. You've become a girl?! What do you do?