I looked at my reflection in the window and saw that I had turned back into my human form and I had lost my wings and my tail as well as my dark skin and dark mana. In short, I was in danger of being discovered. It would seem that the ring lost its effects when I lost my concentration in my sleep which meant that I had transformed during the night. Then that would mean that the person who came into the room to place the bowl of water saw me in human form while I was still asleep.