Cause some spammers are starting to understand that requesting links in this thread wont get them squat. Multiple people including myself told them what they need to do.
Aaaand it didn't last

Spammers' mom is always pregnant. Like the heroine from Nightmare Sphere.
One nice suggestion would be that maybe as Airi's energy gets worn down, it will be much harder to resist. Right now, when she's captured by the enemy, it's so easy to click left and right to set her free. Even if nearly all of her energy gets drained, it's still really easy to break free.
I don't like the way you can just cycle through the animation and end it whenever you feel like it. Would prefer some struggle, like make use of the stamina bar, if it's full escape is easy, if it's drained escape is impossible.
Very strongly disagree with both of you. It's very nice that the game allows you to cycle animations so easily, you can just skip the ones you don't like, watch many quickly... very functional. It's a compromise. If it was integrated in a "stamina" bar, as is the case in many games, it would be more annoying to access specific scenes.
I just use my imagination, pretend that Airi is too worn out to actually escape. Start off with the tamer animations… then knock her down, or switch to a more vicious monster.
I'm glad about that. This game should me made as realistically as possible and wearing Airi down should be the first choice.
I think "realism" kind of helps me enjoy this game.
Monsters have a reason to attack Airi (she has this "goddess energy" that makes her very delectable). As discussed, they also go about it relatively realistically, by trying to wear her down first.
Airi isn't dressed *excessively* slutty (by hentai protagonist standard, at least). There's a motivation for her supernatural resistance.
Airi reacts to horrible undead monsters violating her while sucking out her life force with the horror and disgust I think I would have in her shoes, instead of doing what most hentai heroines do and blush a little flustered because she's ashamed she's enjoying it.
Anymore games to recommend?
Aside from the already suggested, Nightmare Sphere is sometimes compared to Guilty Hell.
By today's standards, NS is graphically horrible, but it's thematically similar and it's amazing gameplay wise.
If you're into breast sucking / life draining, Melody Blood is a winner.