Watakushi, Makemasen node. Seiryaku Kekkon wa Reijou no Tashinami

Summary

Annamaria, the "Black Magic Lady", and Rosalia, the "Silver Knight Lady". These two childhood friends and rivals encounter Duke Jeremiah one day. Hearing rumors that he's searching for a bride, Annamaria approaches him with her own ulterior motives, only to find Rosalia there as well. Just as the two ladies are about to clash, Jeremiah reveals his secret: "I want to marry whoever recovers the stolen Smeraldo". Thus begins the two young ladies' calculating and fateful battle for the hand of the bride!?