Based on the adult manga by Taropun.

A guy who gets a Magic Mirror who can see a place anywhere, can even touch it directly. The mirror was misused by the guy to satisfy his desire to all women. But one day he did the same thing. But He did not know that he had done a pervert thing with his childhood friend, Ayano.

(Source: Nekopoi and Has been Translated and also edited a bit from the Original)