Nova takes place in Japan, going back and forth from modern day Tokyo, Japan to the ancient Meiji Era of Japan. Nova centers around a boy named Katsua Hisoka and a half-dragon, half human girl named Nova as they travel throughout the Meiji Era of Japan in search of the scattered fragment of three magical jewels known as the Jewels of the Three Worlds. Along they're journey they join up with allies and come across many obstacles. Nova and Katsuo's partnership will be tested by every obstacle and challenge they face. Katsuo, Nova and their allies must learn to work together as they go on their journey to recover the shattered fragments of the Jewels of the Three Worlds and go up against their biggest obstacle, Natsumi.