Private Devil Puppy

One was the demon king, and the other was the God of Spring. As a pair of lovers, they were forced to part in their previous life. When they meet again in this life, the God of Spring is now a mortal swordsman and has lost his past memories. A twist of fate finds them on opposite races of a conflict. When lovers become enemies, can the demon king's love warm the heart of the unapproachable swordsman?