According to the information provided, this animation might be Sword God Realm. Plot Introduction: The story takes place in a virtual reality world called " SAO ". The protagonist, Kirito, is a gaming enthusiast. He accidentally transmigrated to the outside of the virtual reality world in a game and found himself trapped in an unknown space. In this world, Kirito met other players and gradually learned some of the secrets of this world. At the same time, he also faced all kinds of dangers and challenges. He needed to use his knowledge and skills to protect himself and others.