Hakuba got the initial request via email:

‘Meet me after school by the gym locker room. I have a very important case for you to solve.’ 

They’d attempted to cover their identity by using a different ‘from’ address, but a quick change in the details section revealed the actual source. Not only did this reveal the work of an amateur, but the name of the person in question. Sawada Michiko; a girl in her first year that he almost never saw. Not because she wasn’t there, but they shared no classes and weren’t in any of the same clubs. Honestly, he was vaguely surprised that he even recognized her name in the first place. 

Gym locker room, though. Did Michiko mean the girl’s or boy’s locker room? The sender name she’d used was decidedly male, but he had a difficult time believing that she would sneak into the inappropriate room for this purpose. He certainly wasn’t going to tress pass for a silly little high school case.  

In the end, the young detective waited in the hallway, right in between the two doors. Little did he know that he wasn’t the only high school detective who had been given the exact same instructions…