Crimson Prince, Volume 15 (Crimson Prince #76-81)

Heaven is divided as the Crimson Maiden's execution begins, culminating in an aerial clash over Hana's right to live. When Kirara proposes bringing the matter before a higher power-the queen of Heaven-Koujirou wasn't expecting his biggest secret to come to the forefront of the negotiation. Now he'll have to face the truth that's haunted him for years...