Saimin Fantasia: Seijo kara Maou made, Tanetsuke Harabote Yarihoudai!!

The protagonist was a guy who enjoyed porn and games and not much else.
By some slip-up he was whisked to another world.
Forest beasts rushed him from all sides, and in the last moment he was snatched from harm's way by a holy maiden on a quest to destroy the demon lord of this world. He joined her hoping to find a way home, but quite the opposite was in store ... intense days of hot magic-slinging hypnotic hedonism!
From his first orgasmic handjob he ran amok in a land of neverending sex!

But where will his journey ultimately end?

(Source: dlsite)