I like this manga because the MC isn't afraid to 'use' his harem correctly. What is the use of having a harem if nobody is busting a nut ... absolutely nothing.
Also unlike other harem manga this doesn't raise several questions about the MC .... such as:
1. Does he have a penis?
2. If he does have a penis, does it work?
3. If he has a penis and it does work, is it really REALLY small and does it embarrass him (causing him to shy away from having sex)?
4. Is he gay? (there is nothing wrong with that but you should ask your artist/author to instead put you in a yaoi manga)
5. If he has a normal sized working straight penis does he suffer from an extreme case of premature ejaculation (causing him to shy away from having sex)?
... our MC here ... he has none of those problems and even if he does he doesn't care about it enough to stop the good times from rolling ... much respect.