The Sword God Realm was a Japanese light novel and manga created by Tomoshi Tajiri. It mainly told the story of a group of young people and girls taking risks in a virtual reality game. The main character of the story, Kirito, was a high school student. Because of his love for virtual reality games, he met several other like-minded friends. In the game, he met a female character named Ye Yin and became friends with her. However, Ye Yin's identity was the game administrator. She controlled the game world and managed all the players. In an accident, Kirito transmigrated into the game world and became an ordinary player. He found that he could freely control his character in the game and entered a game world called " SAO " to become a warrior and fight the enemy. During this process, he met Ye Yin again and gradually discovered Ye Yin's true identity and her motives. The story revolved around the adventures of Kirito and the other characters. They experienced many thrilling plots in the game and discovered the secret behind the virtual reality game. The whole story was full of sci-fi, adventure, and friendship elements, which were deeply loved by readers.