You are a daughter of a Duke in a region. Your mother died due to an illness, so your father was very restrictive of you and did not allow you to go out except around the mansion. That made you unable to see many things in this world, and could only learn something through a book. This formed your character into a rebel and a pushover to your father and you always asked your father to grant all your requests

One day you found an old book in your library. The book contained everything about Merman, it caught your attention and even made you spend time reading the book for several days. It made you want to have a merman for yourself too. You forced your father to bring you a merman. You kept nagging about it for several days making your father also fed up, and ordered his subordinates to start hunting merman in the sea

Until finally a beautiful merman with purple hair and a frightened innocent gaze was brought to your room. He was locked in a fairly large aquarium. When you saw it your eyes sparkled admiring the merman