Your Own Quiz

Reo Mishima, who competed in the finals of the live quiz show “Q-1 Grand Prix,” finds it suspicious that his opponent, Kizuna Honjo, correctly answers a question before even a single character has been read out, thereby taking first place.
Why was Honjo able to achieve this “zero-character correct answer”? From here on, Mishima sets out to uncover the answer to that “quiz.”