Hana is a 14-year-old girl who lives in a isolated castle with a group of demons. She was taken in by Vivi, a 200-year-old demon who found her in front of the castle as an infant. Hana adores Vivi, follows him around, and brings him flowers to make him smile. However, being around a handsome demon who is ageless and protective of her proves to be difficult for her. Hana becomes aware that her feelings for Vivi are that of a romantic love and she tries to find ways to make Vivi aware of her new feelings, even though she is afraid he will reject her and disappear. Soon after they found love, Vivi and Hana had to be separated because holes appearing in the demon world. After waiting 3 years Vivi finally realise his true feelings towards Hana.