Touma Kojirou’s Detective File: Murder at the Opera House

My name is Kojirou Touma. I run a detective agency with my childhood friend, Natsukise Youko. For a famous detective like myself, every day brings mysterious and incomprehensible cases to keep me very busy...

...At least, that's what I wish I could say. No customers at the office again today. Well, I guess the world's a better place when there's no work for us detectives, but...

Still, now I have Youko blaming me for it and lecturing me about how I need to earn a living. Honestly, it's not my fault there's no work coming in...

And, just as I was telling you all this, my little sister Reina has brought along an adorable client.

I never would have thought the coming of this cute girl would lead to the tragic tale of murder which would later unfold.