Unusually in these days, the Kitajima and Yamaguchi families had a customary practice of betrothing the children of both families. However, Nanako, the daughter of the Kitajima family, had no way of knowing that her partner was still a small boy. Nanako is perplexed, but she cannot refuse her future husband, who innocently approaches her, and their first night together comes too soon.... Nanako Kitajima's gentle expression and glamorous body will surely accelerate your excitement level!