"It's the first time I went out at night without telling anyone." Hikaru Yamori, a second-year junior high school student who hates girls, doesn't go to school for some reason. Moreover, he can't sleep every night. One day, Hikaru went out at night for the first time without telling anyone. The night breeze is pleasant and free, completely different from the day. Hikaru found that the night is his home. At this time, the mysterious beautiful girl Nanakusa Nazuna suddenly appeared. She is a vampire resident of the night. Nazuna told Hikaru the fun of the night. "Just wait until you are satisfied today, boy." At night, Hikaru, who was fascinated by Nazuna, asked her. "Please turn me into a vampire." Nazuna told him how to become a vampire. He said shyly. That is... "Human falls in love with vampire!" Will Hikaru, who doesn't understand love, fall in love with Nazuna and become a vampire! ? The special "date" of the two began——