Onahole Quest (オナホールクエスト) – Update EN ver

The protagonist is summoned to a world where the Demon Lord
and his succubi minions have already taken over the world!
But wait! It seems onaholes have demon-slaying capabilities!
Together with his fairy companions, the protagonist strikes out
to save the world with the power of jerking!

Can he make it back to the real world, where his cute little sister awaits?