St Lucia is dedicated to the richest and most influential females in Japan. St Nicholas is the same, except that is an all boys school. St nicholas and St lucia have been rival schools since they've been founded in 1899. However, the principals suddenly decided to merge the two schools together, making them both co-ed schools. Both HSJ and Kuro Yuki, the "rulers" of their respective schools, are against it. A battle for power ensures between the two cliques. Meanwhile, a new transfer student arrives. Will she be smart enough to stay away from these two powerful groups? Or will she caught in the cross fire between them? And in the clash of the titans, who will win?