Officer Ayaki reporting. Naomi Sakaki—the teacher I met in that school bombing case—has been kidnapped. Some guy named Snail left a ransom one billion yen worth of diamonds if I ever want to see Naomi again. What's worse, he's got a big grudge against Himuro for some reason. And now Snail has me running all over town before we make the trade—if I'm not where he needs me to be, no one's going to see Naomi again. But I'm on to this guy, and getting closer—the only thing is, you're never going to guess where the trail finally leads... And there's no way in hell I can solve this one on my own. If I ever needed Himuro, now's the time.