I'm in Demon Slayer and Saving All Worlds

Xuan Yu, who had just traveled to the world of ghost destruction, felt very sad. A mysterious man threw him into this world and gave him a death order: Rewrite the original work and save the protagonist group "So without Zhu Shi's sacrifice, how can we defeat Wuhan?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.