A gasp voice of Office Lady, Yuki overflowing the other side of a thin wall. Job Hopper, Koji of a neighbor making onanism in a gasp voice of the Yuki conveys that the Yuki which met accidentally in a dump site hears a voice from the wall. Be Yuki to be surprised at, but the Yuki which does not understand a feeling liking repeats the Sex which there is not of the Ai. One day Koji asked the Yuki of the wall over there "why you did SEX with the man who did not love it". Be two people who begin to be congenial while I talk across a wall….