Yamamoto is really rather zen about life and death in pursuit of his duty. Gokudera, not so much.

After decades of watching Xanatos play Imperial politics and neglect his family, right up until Tura's death, Granta decides to take revenge on his father. The best way to do that is to make sure Xanatos never reaches the throne he covets, and for that purpose, Granta proposes a marriage alliance with one of the top contenders for the crown and Xanatos's political enemy, the vicious and deadly Marshal Commander Cody. Granta has it all meticulously, ruthlessly plotted out, with no room for error. It's too bad that falling in love with his husband was never part of the plan.