Sumire lives with her husband Kenji, who is a businessman, and although they are by no means wealthy, they live happily. One day, Kenji brings his boss over to the house... but it turns out that the boss is a sex friend with whom Sumire used to enjoy aphrodisiac-induced sex. At first, Kenji pretends to be calm, but he secretly puts the aphrodisiac in Sumire's drink. And the moment her husband falls asleep first, he attacks Sumire, who is losing her mind, as if to bring back horrible memories...