Married for three years, Ai works alongside her husband to pay off their home loan. However, at her real estate job, she hasn't secured a single contract, and if she doesn't this month, she'll be fired. Just then, a middle-aged man named Ozawa requests Ai to show him properties. She immediately starts the tour, but seeing Ai with sweat on her nape, Ozawa uses the contract as bait to slowly savor Ai's sweaty body... until the day of the unknown signature.
