Story: Natsuki comes to the human world by order of Queen Tsuyuha of the Magical Kingdom of "Ever Green" to recover the mutagenic "Seeds" that were stolen. The Seeds possess humans & turn them into demons through their desires. Natsuki, injured on his journey, is saved by Chihaya. After Chihaya learns of the situation, she resolves to cooperate with Natsuki in his duty & become a magical warrior!

Story: Chihaya & friends come to the beach for summer camp. There they meet their classmate Nami Minami. She likes Natsuki, but doesn't have the courage to talk to him. As the darkness inside Nami grows, she finds an old mansion where the "Netherworld Tree" awaits her. It was the start of the incident that would rock the boat?