This is an anime-based fanfiction. It is one of the four series I'm planning on writing.
Summary: Seishi is the eldest Nagisa, the strongest line of halfbreeds. Her siblings have the strangest friends who have even stranger secrets. When she leaves to track down an enemy, Yume and Tooya, a set of gold and silver twins, decide to unlock these secrets not knowing in doing so, will lead them to Seishi's enemy.