Where can I buy a one-shot manga called 'Prisoner' (written in Katakana)? I have been searching for a one-shot manga called Prisoner since years ago.   

The story starts with a salaryman got back home at night and found out his house was really messy. Through the story, the writer leads the readers to believe that the man killed a girl that seemed to be his partner. In the last page, the panel shows a building with only one small window and the bars inside can be seen through it. The ending...


   It makes readers think that the man got in jail for killing the girl. Next, the bars turned out to be mop handles and other cleaning stuff. The plot twist: he is actually a clean freak and never killed the girl. The story is mind-blowing. 


I downloaded the manga but can't find where it is sold anywhere. Where can I buy it?
The one-shot is titled プリズナー (purizunaa, Prisoner) by Masakazu Ishiguro.



It was serialized in もっと！ (motto!, More!) vol.7, published in August 2014.



It can be bought on Amazon Japan.





*The magazine is on hiatus since the end of 2014 and there doesn't seem any licensed English translation of it.