The guests were my parents' friends and their kids...
Right after dinner, I told them that I wanted to watch DC. But we were stalling for a while before we got to be able to watch DC.
During then, I lent DC Volume 37 to one of them. She enjoyed reading it.
We watched DC Movie 7 and then I found out that she was a huge fan of Conan, Shinichi and Heiji.
I think that she could even lead the Heiji fan club.
But she didn't like Kazuha or Ran, or any of the other characters. She called them 'annoying'.
So when I was dissing Heiji's stupidity, she was dissing Kazuha's annoying-ness.
She predicted everything in the movie and said that it was so typical of anime. And she and her sister agreed that DC is the only anime which has childhood friends as Canon couples.