A lackluster office worker, constantly berated by his boss, stumbles upon the weakness of the most beautiful OL in the company one night. "If you just listen to me for one day, I'll keep quiet..." He ends up making a secret lover's agreement with this unattainable, idol-level beauty, a dream come true. They indulge in passionate kissing and riding position, savoring her exquisite body and flesh. He relentlessly caresses her like a slug, his touch thick with lust. Ai, both physically and mentally dominated, transforms into a devoted sex slave. "I'm going to have fun with your body all day today," he says, relishing in the pleasure of being served by his fallen-for mistress. For the man who has succumbed to pleasure, this day spent with his devoted mistress is one he'll never forget. Drenched in sweat, saliva, and love juice, they engage in a sticky, burning, and unforgettable contract of flesh slavery.