A boy genius, Hurt, and a flower girl, Hibana. Hibana, a flower girl, is a dropout. The two childhood friends have lived completely different lives since they were small children. Hurt speaks warmly to Hibana to encourage her to run away from the coming-of-age ceremony. However, his voice did not reach her heart. Then, an incident occurred that changed their destiny drastically... A great adventure set in the World Tree. A few years before the day of their journey In the deep forest, what is it that befalls the inexperienced boy and girl...!