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Toko Aso and Hisae Aso are sisters with a "queen" and "slave" relationship. The older sister, Toko, has the beauty and talent that everyone envy and is currently the president of a company. Despite looking perfect, Toko has another side which she only exposes to her younger sister. Hisae on the other hand, only sees the reason for her existence when she is with her older sister. However, the relationship between the two sisters starts to fall apart after Toko fell in love with a man.