To support her husband, whose business is failing, Mio takes a clerical job at the company Ozawa runs. But her husband Sosuke is deep in an affair and looks down on his devoted wife as “useless.” In despair, Mio takes the option Ozawa had put in front of her — mistress-secretary at ten times the salary — and sinks into a guilty affair. Before long, Ozawa buys out Sosuke's company. Watching her husband lose his position and grovel, Mio, as Ozawa's mistress, ends up looking down on the man she married from above, in the same workplace. A story of revenge, recovery and appetite, soaked in guilt.