Banyuki.

A story of an island country named Horai that was finally about to be integrated under one political administration. Domon DATE, an innocent man confined in a prison island. After 10 years of imprisonment, he kept his sanity by dreaming of retaliating against those who framed him up. He breaks the prison with the help of a man incarcerated in the deepest corner of the prison island. The man identified himself as Saji. His steady road to revenge was obstructed by a woman named Mikoto, the once fiancée of his. Can Domon get his revenge? Who is the man who identified himself as Saji? What are the hidden thoughts of Mikoto?