Xiao Yan Traveled to Honkai Impact III

This is my new book. The protagonist of this book is the yandere Kiana. The male protagonist is Xiao Yan, who is also Han Cheng. This book tells the story of Xiao Yan traveling to the world of Honkai Impact III and becoming the younger brother of the yandere Kiana. He protects the world with his friends. Later, why does he need to befriend Kiana and become a couple? Protect the world of Honkai Impact III. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.