Fantastic! I love it when two tiny naked people who are in love have to survive together, and sometimes make love to each other, especialy infront of a giant, giants, or in a giant classroom setting. Kind of like a tiny porno. Here is an idea. You could make it that for some weird reson, Marks magic is starting not to work, and they have to survive being eaten by hawks, snakes, spiders, or escape giant humans by other means. Everyonce in a while the magic could accidently work again, and shrink another human too. I love tiny couple stories. I hope these ideas help?