Nozoki Ana, or also called A Peephole, is a a one episode OVA that’s 55 minutes long and aired in 2013. It’s based on a manga of the same name. But the manga is 13 volumes and 113 chapters. It was published in 2009.
After moving into his new apartment, art school student Tatsuhiko Kido discovers a crack in his wall. When he peeks inside, he makes eye contact with his neighbor, Emiru Ikuno, as she masturbates. He rushes next door to clear the misunderstanding and inform her of the crack, but accidentally trips and falls over her in the process. To make matters even worse, Emiru now has photographic evidence that would plainly depict Kido as a sexual offender. Kido then learns that Emiru has a voyeurism fetish, and is blackmailed into leaving the crack as is.
Unfortunately for Kido, it doesn’t stop here! Emiru is also attending the same art school that he is, and he will be seeing her far more than he would like to. Emiru and Kido are set to embark on a unique friendship with wildly erotic potential.
I don’t know why they thought they could fit 113 chapters of Nozoki Ana into one episode. The OVA is completely rushed. A college student moves into a new apartment after living all his life on country-side . After moving in, he’s stunned to see a young girl masturbating in the other apartment through a hole in the wall. After this incident, they get sucked with each other and their relationship develops slowly. Only the whole thing is more complicated and the manga explains it much better.
I found the manga but not the DVD for your ownership pleasure. That link is above. Hell, couldn’t even find the video to imbed. But try the streaming service below. And as always, support this site.