'Ayumi' and 'Kenji' were living with Kenji's father, 'Tokujii,' who needed care. The couple couldn't do without aphrodisiacs in their nightly activities... One day, Tokujii swallowed the aphrodisiac by mistake while looking for his medication. Soon, he felt heat rising in his groin and asked Ayumi to chew it for him, causing his desires to explode.
