Okitegami Kyouko no Iromihon

Mamoru Oyagiri, the sole employee of the Okitegami Detective Agency, gets a threatening call demanding one billion yen in exchange for the return of Okitegami Kyouko. Without her deductive abilities, Mamoru must rely on his own memory of her to conduct the investigation. As he takes action, Kyouko awakens in the presence of the person responsible for her disappearance. The contrast between the clean, white detective agency and the dark, mysterious kidnapper sets the stage for a direct confrontation.