I recommend two novels to you ~ The first book was "The Legend of the Vampire". This novel was a novel about the infinite universe, which included a world of pitch-black bullets. The protagonist was an ordinary otaku youth who was involved in the endless war between races to fight for the final Blood Crown. The second novel was "Omnidirectional Fantasy." This book was also a novel about the infinite universe, which included the world of fantasy. This novel told the story of the protagonist traveling through various dimensions to find the answer. I hope my recommendation can meet your needs. Muah ~