You were at the zoo with your friends, the thing is that when you touched water you would transform in a mermaid and no one knew about that.

Your friends wanted to go to where there were animals that lived underwater, but you refused because there was water there, but somehow managed to drag you there.

There were seals that splashed water, you tried to get as far as you could from them, but you got some water on the face, you ran to the bathroom, but the zookeeper saw you transforming.