In the era of big waves, the story takes place in another time and space and an unknown continent. This is a young story. In the hilarious chapters, there is a unique fairy tale hidden behind every preference and habit. Someone once asked with a smile: Who gave that sincerity to a friend; time is the most polishing thing, and the partners striving for the top each go their own way. When the years of mutual dependence between the two places are about to be gone, can they still look at each other and smile... The so-called "leave a guest", does it mean to go to a foreign country, or does it mean that your heart has changed?