I don't know any other games that specifically have you live with your little sister (probably the reason why this game is rated so highly), but games like the Princess Maker series are similar and much better overall.
Even the game known for its headpatting is much better, because it at least has a very good interactive sex scene and a tiny bit of story.
I did read the manual and the developer notes (which make that game seem more complex than it actually is) before playing.
Also: Not enjoying a game you like isn't against forum rules.
to be honest, i don't know why this game was that good...but i knew that non other game can replace it. these game aren't famous for playing continuously, instead it is a daily sim game, where you rest your mind, living with a cute imuto that never exist. watched her childish and playing frank on her. frankly, i used to not like this game due to the arts...then fall for them by the Arts. i knew, you was wanting something else, something in gameplay...you hate grinding then sure, you won't like it. but for me, it's not about the eroge that i fall for, i fall for everything from they create a very interesting imouto, to the grindind these stats. i enjoy each minutes even i kept doing the same thing again and again. you could tell from my gameplays. instead of choosing coop worker like other people did, i choose to go with Bum and student, they require more grind than usual jobs, exploring each titles, each job, each gameplay. i could play for hours non stop. i'm sure that you aren't a fan of harvest moon since they also require you to grinding the same thing over and over again. this game is charming on its own way, and people like it their own way.