青山真治
In an interview with "Midnight Eye", the director Shinji Aoyama said, "I wanted to talk about whether parents really understand their kids and vice-versa. That's really the most basic thing the film is about." In an interview with "The Japan Times", he stated that it was a story about ordinary people, saying "At first they don't understand anything -- then they find out little by little. There's no professional detective. Everyone is an amateur. It's an all-amateur mystery."