So we're going with charismatic Sherlock character here? Alright then.
In the bonus page, Sherlock guessed the plain shirted man's occupation an editor staff from Jump (shounen manga magazine line from Shueisha, but usually referring to Weekly Shounen Jump one), but the man answered that he was an editor from Jump Square (originally Monthly Shounen Jump, still in the same line as WSJ which is under Jump magazine line).
The girls were booing him, but Sherlock dodged it by saying he's still technically right and he didn't say the "weekly" one anyway.