My husband's boss is my ex-lover

Sumire married Kenji, an office worker. Although not wealthy, Sumire's current life is very happy. One day, Kenji invited his boss, Matsumoto, to their house to visit, but when Sumire saw her husband's boss, she was extremely shocked. It turns out that Sumire used to be Matsumoto's lover, and he often gave her aphrodisiacs. Although she was initially happy, he only considered her a lover, so Sumire left.

Today, when they met again, he pretended not to know her. While drinking, Matsumoto secretly put an aphrodisiac in Sumire's drink and a sleeping pill in Kenji's drink. Under the influence of the sleeping pill, Kenji fell asleep on the table, while Sumire gradually lost control, her mind dominated by lust, and her past erotic memories slowly came flooding back...