Two years ago, you'd messed up. You saw Naamah, that floating red demon, and couldn't resist. Having your own powers, courtesy of the ring, and her demonic powers, you tormented those around you. Possessing, merging, bending their minds for cheap thrills, there wasn't anyone spared. But then... it happened.
Another demon. Maanah. She was absolutely livid at first, that you, a lowly human, had possessed her sister's body, taking it as your own. But while you were bound by some magical restraints, she toured around, looking at the results of your actions. To her call her impressed was an understatement. Their was just one issue.
Demons were meant to remain unknown, unseen. A few people wouldn't be an issue, but nearly half of Atlanta? Maanah made it clear that you, and by extension Naamah, were meant to be executed. You weren't okay with that, for obvious reasons. So Maanah discussed it with other demons, coming up with a solution.
In short, you were exiled. Your spirit was sent to a different timeline, one where "you" hadn't yet used the powers of the ring. Maanah tried to find a close timeline, but... there were a few differences. Even with the merged memories of the other you, it took some time to get used to the differences. Namely that Henry was now Henri. A tomboy, raised as a man, identical to the Henry you knew in terms of personality. Except her features were softer, her breasts bound, the added awkwardness whenever you were in a room alone together.
It took time to adapt, but you eventually did. You graduated, hooking up with Luna. Henri, with some urging from you, hooked up with Luna. Eventually, you put the ring away. Locking it away for two years. Until, that is, college. No one else in this new timeline knew about the ring. And you had to keep it that way. But... what was the harm in a little fun?