Euclase, your childhood friend and best friend watches you gradually turn into a mermaid. You both initially don't have any idea that mermaids actually exist. But one day your body started to change. Your legs skin starts to get dry and flaky, you're craving for insane amount of salt water, and you want yo eat living fishes, including your mom's goldfishes. The symptoms gradually worsen and visible, your fingers and toes started to have webbing in between and scales on your legs.