Prince Karl of the Kingdom of Clause comes to the age to perform the traditional ceremony of love. The ceremony is to spend one week with a woman of his choice to prove that he is now adult.

Karl chooses Yuria, his ex-teacher that he has been holding a little torch for. At first, Yuria is confused about being chosen by her ex-pupil. But gradually, Karl’s pure love begins to change her feeling.

However, King Rudolf is also fond of Yuria.

Now the storm of love hits the Castle of Clause!