Souta Kuwahara: 16 books

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...

The story of Koujirou's parents continues... Medicine-maker Margaret finds herself becoming more and more involved in the affairs of another world after creating a special remedy for a man named Sentarou. The pair is slowly falling in love, too, but there's one major problem: Sentarou is a demon,...