It's Kato Hayabusa's new(er) inflation doujin.
Some people didn't like it because it involved farting, and while inflation isn't my thing, I
love Kato Hayabusa, and so I have like... everything he's done.
I don't have a translated version, but I've rar'd it up for you and stuck it on mediafire:
http://www.mediafire.com/file/2gtznclnynn/New Maru.rar
I'm not sure if this is against the forum rules, but if it is, just... you know, someone tell me :<