I only read part of it and I don't honestly remember much of it, but I did enjoy how the game opens with our main character insisting he isn't a siscon, only to spend minutes upon minutes commenting on every single detail of his sister, including how her butt and breasts have been getting more shapely lately.
Oh, and another good one was during the first suppository insertion scene where he fervently insisted that his sister's butthole was beautiful for some reason (can't remember exactly what she said that spurred this on).