You got at the wrong end of a bargain with a demoness and now you have been shrunken and teleported inside the locker room of a public swimming pool. To make it worse you can't just leave the place but have to find a special item, a glowing orb that is hidden somewehere inside the big area of the swimming pool while you have to avoid getting detected by all the giants and giantesses around you. Because in this world, tiny people like you are at the best a toy or a pet to have fun with, at the worst you are just a snack for the first person who finds and grabs you.