The Devil Doesn't Want to Be a Peacekeeper

I've always had one question. I worked so hard, moving forward with hope. But I lost my friends, and I lost my reason for existing. Pain and regret broke me, while grief and despair awakened me. Destruction is my power and my mission, but protection is what my heart desires. I hope the magic box can give her hope and happiness, while I bear everything myself, as long as she can live on happily.