-Prologue-

The King in the Kim Dinasty is open minded kings that are close with his peoples. He is known as kindhearted and a dorky king.  

And this nature kindhearted and dorky down to her daughters.

Ever since they are 5 years old, Princess Taeyeon and Hyoyeon have been taught to learn martial art defense and military strategic. Even though KIM Dynasty’s are friendly and gracious but they have strong military. So they can provide security and happiness for the kingdom and its people.

In their training times, princess Taeyeon and Hyoyeon always accompanied by their beloved cousins, princess Yuri, Yoona and Sooyoung.

When they are bored with their routines they will always sneak to go and play outside the kingdom. And not to be easily identified they always disguised and dress as men. Their action is attracting a lot of the girls. Because their handsomeness and behavior they are called with the five handsome swordsman.

Until one day in the age of 17th king Kim sent Taeyeon and their siblings out in a neighboring country to sharpen and be familiar with all the science and culture they can provide so they can improve their knowledge for their kingdom.

---

Meanwhile in Jung Dinasty, King Jung Yunho is a very orthodox and conservative man, their Kingdom is prosperous and wealthy, so lots of kingdoms try to conquer and take over their land and possession.  

Since they are kids, Princess Jessica and Krystal lived a great life in their kingdom, they were dancing and having fun with their cousin’s Tiffany, Sunny and Seohyun. In the middle of their pleasure they always have time to learn about plant and herbs. Because their country is rich in plants and minerals.

The wealth of their country as well as the beauty of the princess made their country becoming targets of every man from outside of this kingdom.

---