The midsummer of fifteen years old, the most beautiful years. Everything happened so unexpectedly that Xiaoying never expected that her ordinary and indifferent life would cause such a turmoil. In the midsummer of that year, she parted ways with his childhood sweetheart, and she met her destiny. A commoner is actually involved in the secrets of the entire royal family. What kind of unspeakable secret is hidden in her life experience? Is the person who spends these difficult days hand in hand his true destiny or his sworn enemy? Where should she go? About the taste of first love, about the companionship of growing up, about the helplessness of separation, about the truth of family love, about the future of the royal family...