About

Kou Yamori, who wandered the night due to disillusionment with daily life, meets Nazuna Nanakusa, a vampire girl. She teaches him the joys of the night, and Kou becomes fascinated by the beautiful night and her free-spirited nature. After tasting Kou Yamori's blood, Nazuna wants to keep drinking his delicious blood, and Kou himself wants to become a free vampire like Nazuna, so they decide to help each other. The condition for a human to become a vampire is to be sucked by a vampire they love. No matter how much blood is sucked by a vampire they don't love, they won't turn. Therefore, Kou Yamori must fall in love with Nazuna Nanakusa to become a vampire. However, a vampire will die if they suck the blood of the person they love. After their first meeting, the two spent enjoyable nights together and grew to like each other through various events. Realizing she loves Kou Yamori, Nazuna Nanakusa decides to leave him, fearing her bloodlust might cause her to harm him. Kou Yamori instinctively knew Nazuna was going to leave him and agonized over his farewell. But Kou didn't want to let her go yet. When the train they were waiting for arrived, Nazuna grabbed Kou's hand and jumped inside. After a parting kiss, she confessed her true feelings, promised to find him again someday, and disappeared into the darkness. Kou thought about chasing her but didn't, because she said she would come back for him. However, when there was no sign of her even after a year, Kou decided to find her himself. Three years after Nazuna left, Kou finally reunites with her.