"It's the FBI and Onee-chan open the door!"? Too bad the mom isn't a horrible cook or else it would be funny to see her older sister bust in with him half dead on the floor after eating his mom's awful cooking.
This is one of those things that are just "so stupid yet it works somehow" like Slime Tensei and probably a few gems I don't know of.
I become really attached to the characters. I just want the mommy loli to be proud of her son. I just want the son to stop worrying and be happy. I just want some good mother son moments they couldn't have when after the mother died.
So, yeah, giving the premise and probably having a at least minor knowledge of the "lewder types of mangas", I can guess what concern some potential readers might have to not pick up this series. Minor spoilers, so Ill tag them, but I keep them with little information as possible:
Until chapter 9, she really just has the mother role and there is no romance stuff between them, but there is at least one other party he is interested in.
"A nice wholesome heartwarming story from a dude who was throwing naked sisters at their brother from chapter 1 and kept throwing more girls including a teacher at him through many more chapters."
I keep taking it off and someone keeps adding it. It's not, and if the person thinks it is, it's a reflection of his own pruriency to see things the way he wants to see it.