Yeah... after reading this and processing it, I can understand why the score is pretty low.
I would probably score it in the 6.0-6.2 rating.
It's a cute read tbh, but when you get to the core values of it all, MC is a scummy asshole.
Personally I think "Kimi no Okaasan wo Boku ni Kudasai!" did this premise better,
but I can understand that this is a diff manga with a different type of story.
Personally not my cup of tea as I can't stand sex crazed MC's don't give a second thought to who they might hurt with their dick for brains,
but might as well keep reading cuz the mom is pretty hot.
10/10