Paradise on Earth

Junichiro Sato wanted a normal high school life but so far the first semester of his second year has been anything but that! Five girls, all of which have been giving him a strange amount of attention is already enough, but now in second semester the new student Chikako Nori makes six, and she seems to already know him!? Even worse, she and Sato discover this invisible wall outside of their town where the only thing that can't leave is human beings. Could this wall be the reason his friends are starting to act different? If so, why would someone do this to them? Will Sato be able to save his paradise on earth? Or will he submit to the unforgiving laws of this world and fall into despair?

I would like to make this as good as it can be, any feedback is appreciated and I will do my best to respond as soon as I can. I should also mention that there are a lot of references, some more explicit than others. Unfortunately because of copyright, I had to chang...