The history of Marriage Royale revolves around the main character of the male floor, a high school student named Zuchasa Giotnoto, to whom his parents once say that he was adopted. In addition, he is told that his real father-manager of a large company, which means that it is very rich and has a great power. Tsukasy's real father wants his son to marry a good woman, so he organizes an event, known as Marriage Royale, where beautiful girls from all over Japan will gather at school, built specifically for this event, and will fight for becoming the fiance of Tsukas. The school is located on a secluded island near Japan, and Tsukas himself delivered there to live in a mansion under the supervision of two twin maid: Miku, the older sister, and Miu, the youngest sister.