Detective: I'm Sato Miwako's Informant

The Conan world.
Shuichi Shiraishi arrives in this world only to discover that he is just a small-time thug, and at the same time becomes an informant for Miwako Sato of the Metropolitan Police Department.
It's perfectly normal for thieves to be afraid of government officials.
He felt he couldn't let this go; he had to get revenge on that woman, Sato Miwako—by living in her house and spending her money.