Seduced by the Demon King: A Sensual Rebirth Vol. 4

Once archenemies in her former life as a Saint, Haruka and the Demon King have found love in the human realm. Now that she has the perfect boyfriend and work is no longer soul-crushing, Haruka is ready to settle down and enjoy a life of bliss. But a visit from High Priest Lux interrupts their blossoming romance when he claims she must return to her previous world in order to save it from collapse. Will revisiting old wounds douse the passionate flames they've ignited for one another?