I think it was fun to go through for a first attempt at something. Some of the story elements were okay. But at the end of the day as harsh as it is to say, there is nothing new going on here making me go 'oh okay, let's see what is going to happen'. As people had mentioned there are a few things going on that have me hit the breaks a bit.
1) Pacing
As stated, pacing is insane. Teacher comes in, waves magic penis and everyone goes bonkers and EVERYONE jumps on him in about 2.3 heartbeats. A little fast
2) MC Dumb Like A Bag Of Shrimp
I mean I am looking at a pic of Rebecca with a black strip over her eyes and I am going, oh that's Rebecca. You telling me that the MC who knows her better than I do can't see that that is her with a black strip. Mom comes out of hours of teacher meeting with cum on her chest and the MC goes, "Yay I have mom back I get fed". Like wtfbbq? No one on earth is that stupid and I deal with a lot of dumb.
3) Everyone Wants Magic Penis
Uhm..., no. I know it is an NTR thing but are you telling me no one has a) morals, b) self control, c) complete disinterest, d) self respect. Either or all of those kind of come into play. Sure there are nymphos, but you can't tell me what not a single person in that classroom alone, much less parents and/or adults, don't kick him right in the Mommy & Daddy Button if not just tell him to go fuck himself. The only person that told him realistically to go screw himself was the MC's sister, and the gallery made me scratch my head wondering what I missed and if she too caved to the magic penis.
4) How Is Teacher Not Arrested/Fired
In most places, exposing yourself to students will get you canned faster than you can say NTR. Again, you can't tell me that #3 above is an absolute. One of them will go home after saying 'sure he has a big dick but he is gross as shit' and say 'the teacher pulled his dick out in the classroom' and the parent would have the power that be on speed dial. So not completely realistic in that suspension of disbelief kind of goes out the window. Now add in him sleeping with most of the student population, he would never work in education again.
The whole NTR thing unfortunately follows the same setup all the time. MC is a wimp, has a small dick, insert other aspects, etc. Here comes Giant Penis Mcgoo and it becomes the most important thing in the universe where a dong ALWAYS trumps personal/emotional connection, history, and even love two people have for eachother. As I said this literally shows no difference in that path. My attention was caught with the whole Emma sticking with the MC regardless. I was looking at it going, "Hmmm this could be different for once because the shit head might actually whiff on one at bat". But nope, she is falling under #3 which with everyone else and again makes no sense, because penis trumps emotional and personal connection. No it doesn't. Again I understand it's the genre, but something original would be neat for once. The minute Emma throws away her relationship because penis is the most important thing in the universe, time to hang it up and wont deal with the creator's works. I could be wrong, and I am intrigued to see if I am wrong, and it would be neat to see that the MC wins one, that there is an eventual cost for the teacher doing what he is doing. But I don't think that that would happen.