A mysterious story about sleep, a youthful love unfolding in high school, the thought process of an immature girl, and the process of transforming into a butterfly. During this period, there was no lack of taste, no lack of overflowing love, and no lack of poetic romance. In the end, her maturity created her natural ability to live in a free kingdom with nowhere to go. Everything we yearn for is gradually achieved in this story, and we slowly move towards the transformation of mental maturity.