Sword Art Online is a Japanese anime based on the light novel of the same name by Reki Kawahara. The plot begins in a virtual reality MMORPG called Sword Art Online, where players find themselves trapped and forced to fight for survival. The main character, Kirito, and other characters explore virtual worlds, face dangers, and look for a way to return to the real world. Anime is known for its dramatic storyline, romantic elements, and philosophical questions regarding identity and relationships in the virtual and real worlds.