Daisuke and Shiori are celebrating their third year of marriage, enjoying a loving and happy relationship. However, one day, a medical diagnosis threatens their future together, bringing a major turning point into their lives. Unable to bear children herself, Shiori pleads with Chisato Shoda, a beautiful and mature woman from Higashi, the reigning Yokozuna, to become a surrogate mother and carry Daisuke's child. With gentle yet intense emotion, Chisato promises to fulfill this request, offering her alluring body to help the couple. As this surrogacy arrangement unfolds, will it strengthen their marital bond or give rise to new conflicts? A tangled, passionate story of love, desire, and forbidden emotions begins here.