Nagi Asakura, a rookie salesperson at a life insurance company, is troubled every day when her grades don't go up as expected. One day, if her impudent customer takes care of her son "Shota", she smells her contract. Then, he fell in love at first sight with Nagi's huge breasts, who went out to take care of her for the sake of the contract. While Nagi is at the mercy of Shota's naughty pranks...
