The president's daughter of the well-known apparel brand 'OTO', Aiko. She lives in a luxurious mansion with many servants, one of whom, Ozawa, has taken care of Aiko since she was young. Spoiled since childhood, Aiko is particularly harsh on Ozawa, always being selfish and constantly causing trouble for Ozawa. Taking advantage of the fact that Ozawa cannot retort, he has been manipulated by the younger, arrogant girl for a long time. Ozawa had long since exceeded the limits of his patience.