One day, when Minami returned home from university, she found a man talking with her father in an unpleasant mood. This man was Sugaura, who had once been her father's subordinate. A few years earlier, he had left to start his own business, but it ended in complete failure, leaving him with massive debt, so he came seeking help from her father. However, her father refused to assist him, and Sugaura left. Soon after, he began showing up again, targeting times when her father was away. These visits would become the catalyst for a dramatic upheaval in Minami's everyday life.