While anal-focused games for straight guys are rare and this one delivers extreme ass stretching content, I cannot say it is a good game. I have played the version never than 0.8 and the story is pretty much finished. It is basically a very linear VN and in order to progress, you must follow the instructions in the quest log (absent in 0.8 but existing in 0.9) to the letter, otherwise you're risking not just missing scenes, but encountering a game-breaking bug, when the sequence of events gets mixed up and you're unable to progress. And to progress in the game you need to grind until your eyes bleed and it's absolutely no fun jumping from one empty location with just one NPC to talk to or one item to fetch to another at a specific time of the day (which is not self-explanatory without the quest log) and then assigning your female heroines to the same ass-boring (pun intended) jobs, so they may bring profit (meagre at first) and also improve their service, so you can trigger scenes with more extreme anal content. But these are just one time scenes and between them, the player has no way to really play with the three (at the moment) asses. It feels like such a wasted potential, just a silly grindfest with unlockable super-raunchy CGs. It would have been a great game if executed as an animated simulator of anal training with just one girl (basically they're all the same paperdolls with different hair and skin color anyway) where the repeated simulation of the butt in a bunch of positions / scenes turns an innocent but curious woman into a total butt-slut with her rosebutt in full bloom. But as they dev has trouble with providing a fail-safe and bug-free logical structure to this little Renpy story stretched to unbelievable lengths (but no depth), I don't think he'd be up to the task.
The graphic content is deliciously pornographic though: exaggerated and tasteless, but with a sex-positive, consensual angle... which is how exploration of unusual sex practices in real life should be.
It's a solid 2.5 stars from me, so a small puckering anus.