Pic not related
This is what I remember about it:
-fantasy setting, knights, dragons and shit
-dude became a king doing a pact with a demoness
-women are forced to pee outside so the queen ask for mercy
-Around the last ova the guy summon a monster to fuck his girl and betray the demoness too
And if possible a cg game were a submarine get stuck in the sea and the crew fuck the girls
Himekishi Lilia?