Nozoki Ana (Japanese: ノ・ゾ・キ・ア・ナ, lit: A Peep Hole) is a Japanese manga series written and illustrated by Honna Wakou about two college students, Tatsuhiko Kido and Emiru Ikuno, who are neighbors in the same apartment complex and are connected by a small "peephole" between their rooms.

Nozoki Ana was serialized in Shogakukan's Moba Man mobile phone manga magazine/website from 2009 to 2013, with its chapters collected in thirteen tankōbon volumes.

Emiru snaps a photo of them in this awkward position and insists that she will only erase the picture if he leaves the hole and allows her to peep on him.

Later in the story Kido, even though Emiru tries to stop him, finds out that his girlfriend, Kotobiki Yuri, is using him to cheat on her other boyfriend who does not care what she does.

In September 2012, the wraparound jacket band of the twelfth volume of the manga announced that an anime adaptation of Nozoki Ana had been green-lighted.

[15] It took form of an OVA that was released on DVD on February 28, 2013, with the limited edition of the final manga volume.

A live-action film based on the manga and directed by Ataru Ueda and Kensuke Tsukuda was released in Japan on June 28, 2014.