Unfading Mark

Everyone is born with a mark. This mark determines who you are to spend the rest of your life with. When you meet your soulmate, your mark will begin to fade away. As you two grow closer the mark will eventually disappear. But what if you fall in love and the mark never fades? Are you not right for each other? Is there someone else out there waiting for you? Can you really be in love or do you just have an unfading mark?