I'm with the majority of the other reviewers;
OK, so it's not 'incest', but I think it is. At one point, one of the girls, currently sitting on your crotch, refers to you as "my long lost bro... friend", so yeah.
Each of the 'target' females feel real, with differing personalities, and differing intents, which is refreshing.
I'm not 100% with the character models, but they do grow upon you. After an hour, if nothing else, the eyes and mouths are delicious, and I'd like to suck on them.
Plot... the usual. However, I find it homely and pleasant. Sometimes a well trodden path is well trodden for a reason. There's nothing I would change.
Overall, 5/5. Want/need more please!