An incredible thing caused cracks in "my" originally peaceful life. The mysterious black-haired man turned out to be the terrifying Satan; the "uninvited guest" who stayed in the house turned out to be a silver-winged angel - a beautiful boy who turned out to be a silver fox. Under his leadership, "I" found other angels one after another. The mysterious "dark" organization, originally a rebel party in both the immortal and demonic realms, launched a heavy pursuit of "me". Amid the flashes of swords and shadows, my identity finally came to light. Where should "I" go when my power is fully awakened...