This is definitely porn.
But then...why is it treated as a normal anime?
This should be on Hentaiheaven, not on MAL...
Well perhaps because in the past decade anime has slowly lowered itself to more shock value or base appeal than it used to. We live in a post Eromanga Sensei world after all.
But ES was abysmal to the point that it deserved its own specialised laboratory to try and understand how we could have fallen so low.
Nande Sensei no Mune wa Itsumo watashi no Hana wo Dakishimete is just porn.
Remember when To Love Ru was advertised as a proper anime, despite it being porn? It was advertised as anime because it was strong enough to pass as one...to some. As far as I'm concerned, it was just porn with the guise of a plot and a romance subtext that hid the harem/porn/teenager power fantasy about as well as a white sheet covers a pool of blood.
So after To-Love Ru, after Maken-ki, after probably a few dozen I've very willingly let pass: should your penis watch Nande Koko ni Bokki ga Kuru?
No.
It's not even worth a good snake polishing.
The art is good. Yes. There's the beginning of something there.
And that's all there is. A beginning. There is no story, fun, sexiness or anything, it's a porn that pretends to be a comedy and is neither funny nor arousing.
Shimoneta, To Love Ru, Shokugeki no Thousand Orgasms, they all have used a great pair of boobs better than this, either to be funny, either to give your pants a stretch test.
If anything, the manga has the same art and is way less of a tease. Still not worth reading.
