Kaiwu: Starting from Joining World Tree

During the summer vacation of that year, a space rift in Helheim Forest suddenly appeared and sucked in an ordinary boy who had never been out of society. By chance, the boy obtained the Zhanji Drive and Acorn Lock Seed, and transformed into Kamen Rider Brown Shadow. In order to survive and find his former homeland and family, young Hong Yu began his journey of survival as a knight. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.