That Immortal of Gensokyo

Everyone has their own Fantasy Land in their heart. Though Fantasy Land is the life's work of Yakumo Yukari, it's also the life's work of Xingchen. Eternity is no easy feat, so Xingchen must persevere! Let's build an eternal Fantasy Land together! Regain my strength and transmigrate through the fantasy worlds! I'll keep going until Fantasy Land becomes an independent world!

PS: I haven't been into Touhou for long, so please point out any mistakes in the story!