Our Last Crusade or the Rise of a New World, Vol. 7 (light novel) — Kei Sazane

BURNING BRIDGES The Nebulis Sovereignty is in flames. For the first time since its founding, the Paradise of Witches is raided by Imperial forces. It's Imperial solider versus Sovereign witch. Saint Disciples against Purebreds. Unit 907 toe-to-toe with the House of Hydra. While war indiscriminately obliterates all, Iska squares off against Alice. Finding each other on the battlefield, the two discover their circumstances have changed for the worse. As paradise falls, they face a choice that might alter the course of their relationship forever…