Masako Sueyasu

Aoi is a moe-type maid working on a wealthy Osaka estate. In reality, though, she is an undercover detective sent by the police on a special mission to investigate a suspect.

Kiriko (Kie Kitano) is a professional cleaner who solves cases and "cleans" hearts at the office building she works in. She uses her innate deductive reasoning, keen observational skills, and position that allows her to infiltrate any situation.