Hands-down the best cohabitation simulator of all time. One of the best H-games of all time, overall. A ludicrous amount of content, incredible art, and a high degree of interactivity. The sister has many different responses to different things based on trust, sexual interest, and lust, which makes her feel more "real" than most characters in these kinds of games.
You really need to build your relationship over time through daily interactions, so you get a great sense of progression from "just normal siblings" to "fucking like rabbits". Some might say it's grindy, but in my opinion it's a perfectly paced slow burn. Easy 5/5.
The only criticisms I have are that not all of the scenes and CGs are present in the memory album, and that there isn't a ton of H-content with the other girls (although that second one is understandable, the title makes it very clear that they aren't the focus of the game)
You really need to build your relationship over time through daily interactions, so you get a great sense of progression from "just normal siblings" to "fucking like rabbits". Some might say it's grindy, but in my opinion it's a perfectly paced slow burn. Easy 5/5.
The only criticisms I have are that not all of the scenes and CGs are present in the memory album, and that there isn't a ton of H-content with the other girls (although that second one is understandable, the title makes it very clear that they aren't the focus of the game)