The Famous Detective Was Shrunk and Gender-Swapped

What if APTX4869 could not only shrink people, but also change their sex?

I'm high school detective Shinichi Kudo. When I went to the amusement park with my childhood friend and classmate Ran Mouri, I witnessed a transaction involving a mysterious organization.

At the time, I was so focused on spying on the deal that I failed to notice another accomplice sneaking up behind me. That person forced poison down my throat. When I woke up, my body had shrunk, and I had turned into a girl...