Nazuna's building

Nazuna Nanakusa's Building is an abandoned multi-tenant building in Kou Yamori's neighborhood and solely inhabited by the vampire Nazuna Nanakusa. It was famous for nobody in the area knowing which purpose it served. There were even hopeful rumors that it could be a brothel.

Appearance
While the height varies between chapters, the building is usually portrayed as 7 floors tall, each floor marked by huge, partially broken windows. The exterior and construction, in general, are in a very run-down state. At the bottom are an entrance, several vending machines, and an external staircase leading all the way to the top floor. The rooftop is equipped with a large fence. There is an elevator with a mirror inside and many empty offices with a few bookshelves, lockers, desks, and chairs. Despite being abandoned, the building is powered by electricity, shown by the numeral lights and Nazuna's electronic devices.

While Kou Yamori engages in a fight with the vampire Susuki, the building gets heavily damaged to the point of becoming uninhabitable.

Nazuna's apartment
Nazuna lived in room 704. Her apartment was sparsely decorated but contained an AC, a TV, a jukebox, a black sofa, a houseplant, a fridge and microwave, various gaming consoles, a lamp with indirect lighting, and a futon that was either used to sleep alone and with her guests or for Nazuna's work since she was also running her snooze shop inside her apartment. Nazuna later bought a bed and a shelf filled with client documents, massage toys, and other stuff for her snooze shop. She also filled her closet with lots of cosplay to suit the various tastes of her clients.

Trivia

 * It's unknown why the building still gets supplied with electricity, but there are likely vampires within the energy department who know Nazuna lives there.
 * Azami managed to retrieve Nazuna's furniture and electronic devices from the destroyed building.
 * For unknown reasons, several neighboring buildings were removed in the anime.