ノ・ゾ・キ・ア・ナ

Tatsuhiko Kido, an Art school student who's staying in his apartment, one day discovers a hole in the wall of his apartment room. He peeks through the hole, but when he does so, he sees his neighbor, Ikuno Emiru, changing her dress and he's caught peeking.. later on she tries to blackmail him into peeping each other every alternate day.