is a Japanese manga series written and illustrated by Kotoyama. It has been serialized in Shogakukan's Weekly Shōnen Sunday since August 2019. In North America, the manga is licensed for English release by Viz Media. An anime television series adaptation produced by Liden Films aired from July to September 2022 on Fuji TV's Noitamina programming block. In 2023, the manga won the 68th Shogakukan Manga Award for the shōnen category. Plot Unable to sleep or find true satisfaction in his daily life, Ko Yamori stops going to school and begins wandering the streets at night. He encounters a girl named Nazuna Nanakusa, a vampire who shows Ko the joys of being a night-walker. This results in Ko wanting to be a vampire as well, but in order to achieve his goal he must first fall in love with her. Characters Main A fourteen-year old boy in his third year of junior high, who slowly finds himself unable to sleep because of his dissatisfying life. To reinvigorate himself, he slips out at night to walk the streets. Ko is trying to fall in love with Nazuna in order to become a vampire and leave his human life. It is later revealed that as he begins to develop more emotionally, he can enter into a half-vampire state. This half-vampire state seems to be dependant on emotional or physical distress at first beginning happening as soon as blood is drawn either by blood-sucking or attack. Ko learns that slight pain, as small as an ear piercing, can activate the state as-well, Anko later gives Ko an ear piercing kit so that he can help in defending the group from increasing threats that begin to develop. Anko also believes that by entering this half-state repeatedly, Ko's vampire half will eventually take over his human half, or that as his love develops for Nazuna, the transition will complete. Anko mentions that this is all speculation at this point due to Ko and Nazuna's mere existence, that of which being Nazuna's having been born from a vampire and a human, and Ko's half-vampire transition. A "night-walker." She encounters Ko on his night out, then offers to stay with him at an abandoned building to free himself of his worries, where she then sucks his blood as he sleeps. She is very shy when it comes to love and gets embarrassed easily, but enjoys lewd jokes and