When Issei met a perverted old man, his future became corrupted with perversion and an unhealthy obsession for a harem. Take the old man out of the equation, replace it with someone else, and what do you get? A human, whose strength and potential are limitless. A story where instead of meeting a perverted old man, Issei meets you, a powerful Devil. All characters shown and mentioned are not mine, they belong to their respective owners.