Parallel Paradise Vol. 11 (manga)

After protecting Meese town from the witch Galia, Yota and his cohorts head to Sandrio to awaken Yota's childhood friend. The bizarre and cruel creatures they encounter in the forest are bad enough, but an even worse surprise awaits them at the desert town. A mysterious army surrounds the city led by a beautiful and ruthless female knight who swears to destroy the only male in the world, along with any woman who supports him!Series Overview: A normal day at school takes a strange turn for Tada Youta when a bizarre apparition shoves him out a third floor window.

He awakens in a fantasy realm unlike any other. Not only do dragons and knights exist, but every single inhabitant of this world is a voluptuous babe! No men have been seen in the kingdom for thousands of years, so Youta is about to get very, very lucky. Whether Youta has actually died or been transported to this place for mysterious, unknown reasons...

either way, it's his version of Paradise!