A high-ranking executive at a major corporation named Ooishi was worried about his son, who showed no interest in working hard. He thought that if he had a girlfriend, things might change. So, he arranged a blind date between his son and the daughter of one of their subcontractors, Yū. However, Ooishi had ulterior motives; he wanted to keep Yū close by and make her his own personal plaything. To ensure this, he forbade any physical contact between them until after they were married, even during their engagement period which lasted a year. Once the year was up, Ooishi sent his son on a five-day business trip, leaving him alone with the eager and sensitive Yū. Their intense training began...

大企業の専務・大島は一向に働く気がない息子を憂いていた。恋人でも居れば変わるだろうと、下請け会社部長の娘・ゆうと見合いをさせた。しかし、大島はこの状況すらも利用して、自身のお気に入り・ゆうを傍に置き、我が物にする算段だった。息子にはゆうを触れさせまいと結婚までの1年、婚前交渉を禁じた。そして翌年、息子には5日間の出張へ行かせ、禁欲の日々で敏感な身体を持て余すゆうと2人きりの調教生活が始まり…。