After her husband disappeared following a failed business venture, leaving behind massive debt, Izumi found herself cornered by loan collectors from the yakuza group Mochizuki-gumi, who had acquired the debt. With no other options, she turned to her wealthy former junior from college, Ayaka, for help. The story unfolds as Ayaka offers her assistance in an unexpected way, drawing the reader into the evolving, intense relationship between the two women.