Born into the prestigious Seishi family, Tomoko Kunikawa becomes the head of a volunteer organization run by Sawaki, her late father's secretary. With an elegant and pure personality, her life takes a sudden turn when she meets a man named Kuwabara. What she doesn't realize is that this encounter marks the bittersweet beginning of a love affair—soon to spiral into obsession, violation, and unbearable humiliation as her rationality melts into a squishy mess.