A battle for supremacy between the two clan. The Shintaro clan and Kagami clan are rival for decades. They are trying to surpass each other achievements. That was way old for the new generation. As the succession is coming to change leadership, The Kagami's has no heir but an heiress. While the Shintaro clan has a twin heir namely Akira Shintaro and Hanna Shintaro. And the one you promise the love to him and to her, Kenta Sanada.