'Tokuya' lives with his son 'Koji' and wife 'Ayumi', a couple for whom aphrodisiacs have become essential to their nightly intimacy. One day, while searching the room for his regular medication, Tokuya accidentally ingests an aphrodisiac. Feeling intense heat in his groin, he has Ayumi chew the drug for him, triggering an overwhelming surge of desire. From this unexpected incident in their daily lives, the couple's relationship takes a bold and transformative turn.