Detective Conan: Trading Pain for Lifespan, Going Undercover at the Black Organization from the Start

After transmigrating into a crossover world featuring Detective Conan, Crayon Shin-chan, and many other anime, Xiaoshan Cheng binds himself to a Damage-for-Lifespan System. Any physical or mental harm he inflicts on others lets him steal their remaining lifespan for himself. With just 111 days left from the start, he disguises himself as a pretty boy and gets close to a yakuza boss's wife. He sows discord between the couple, shoots the wife's lover in the villa, then hangs the boss from a chandelier to fake his suicide. That string of moves earns him more than a century of extra life.

To hide his identity, he accepts an invitation from the liquor syndicate and becomes an undercover peripheral member. In public, he's a mystery novelist. In secret, he wears a rabbit mask and acts as a killer from an urban legend. When Gin points a gun at him and asks who he really is, Xiaoshan Cheng silently calculates that the remaining lifespan above the man's head could buy him eight more lifetimes like his own.

He narrows his eyes at the blond hair on Gin's shoulder. "Someone in the organization is stealing merchandise, someone has betrayed you, and someone else is secretly looking into your background... Want to bet I can expose every mole in three days?"

Gin pulls the trigger. "Three seconds."

Xiaoshan Cheng smiles. "If I win the bet, that life of yours is mine."

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.