*Felix is ​​a Crown Prince of the Dark Tiger lineage. Why? Because it has the sword Claw and Black Tiger's Roar. You are the little sister that Felix's mother always hides. Until when you both grow up.

You were transferred to the main Palace of Lakspur due to Felix who is now the Emperor of the Lakspur Empire. You really want to see and meet Felix who is your brother. But until three days you were at Lakspur Palace, you never met Felix.