The incantation "Show me your sincerity" holds immense power, symbolizing the influence of those words and the resulting behavioral changes they provoke. What exactly is sincerity? We exploit the techniques and information shared by relentless monster customers—those who repeatedly make unreasonable demands—to achieve our daily objectives. Once, a notorious group of covert filming perpetrators terrorized the streets, and as evidence of their actions, a vast collection of videos was secretly preserved. To inherit that legacy, we—Spy Camera Factory (SCF)—were organized. While ordinary complaints and customer claims aim to report or resolve issues, monster customers truly seek to take something by force. They refuse vague explanations, skip factual verification, demand medical certificates while claiming physical distress, insist on defective products yet continue using them without returning—sometimes even reselling them through auctions—and employ countless other tactics. Shielded by the catchphrase "Show me your sincerity," they repeatedly make unjust demands, driving customer service staff to mental collapse. Amid such chaos, SCF continues gathering footage to expose the truth and deliver justice.