Gave it a quick read, this is the 4th story centered around parallel genders I have read so far. The guy gets thrown into a reverse version of his world where girls vastly outnumber the men. Not just this, but the standards of appearances has also been warped as what is ugly over there is attractive to him. Story? Well just him trying to survive and jump straight into action in 1 chapter damn. Besides the intercourse, the most impressive part is seeing the explanation of his self from the other world. How he switched places with his "self" between worlds which gives new meaning tothe idea of a parallel world.

Decent read, it's better than I expected