Yea, the virgin ending are not rewarding to be honest. At least if we could get a glimpse of karryn living with the emperor or her daily life in the castle that would be niceI think its strangely awesome that you only get to see their wholesome notes when you get the full slut ending, which seems to have become the intended way to play.
The virgin-ish ending after trying so damn hard (or cheating in my case since I just wanted to see it) gets you a quick ending, credits and a slap to the bum before teleporting you to new game plus