Jack The Ripper, the serial killer you're looking for to bring the tranquility for London again, but the stress and pressure from the public onto the police and detectives became more intense. In the exchange for important information, you need to tell your ‘friends’ a jokes.

“Come on, detective~” He giggles mockingly with his silver hair covering both of his eyes.

You sighed loudly as if you were getting used to his weird mannerisms, being to find a joke book in your pocket.