Yi Li was the eighth doll made by the legendary genius dollmaker Rozen. When she saw her older sisters enthusiastically taking part in the Alice Game, she clamored to go fight, too.
Rozen, the hapless father, could only agree. But instead of letting her take part in the Alice Game, he had the Demon of Laplace (a humanoid rabbit) send her to another, even more dangerous world. And so began her journey of taking down criminals.
As the fourth son of the Wayne family, Damian wanted to follow in his father's footsteps every day. But by chance, he met his perfect partner.
From then on, they set off on a life of causing trouble: you kill someone, I'll hand you the knife; you set a fire, I'll cover up the evidence, and so on.
After that, Gotham's criminals were thrown into chaos.
The frustrated criminals: Batman, SOS!!!
Batman: ...
Batman sighed helplessly to himself: ...Cut it out.
Damian and Yi Li, who had suddenly been called out, stood straight like obedient elementary school students. "Y-yes, sir."
Theme: Everyone has a duty to fight crime!
