Nozoki AnaNozoki Ana.

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. It was adapted into an original video animation in 2013 and adapted into a live-action film that was released on June 28, 2014.