ノ・ゾ・キ・ア・ナ

Nozoki Ana, also known as "Peep Hole," is a Japanese manga series written and illustrated by Wakou Honna. It was serialized on Shogakukan's mobile manga website "Moba Man" from 2009 to 2013, and compiled into thirteen tankōbon volumes. The story follows Tatsuhiko Kido, an art student, who discovers a hole in the wall of his new apartment through which he can see his neighbor, Emiru Ikuno. Emiru then proposes that they take turns peeping on each other, initiating a forbidden and immoral relationship. The manga is known for its explicit sexual content and was designated as harmful material in some regions. Aside from the manga, it has been adapted into an original animation DVD, a live-action film, and a social game. It gained significant popularity, achieving millions of downloads and sales. The story uses voyeurism as a starting point to explore complex human relationships and desires. Additionally, it has spawned a spin-off manga called Nozo × Kimi.