Like everyone else already said, the visuals are great. The rest, not so much.
The main problem this sandbox game has, is that it's divided into two sections. One is the classic sandbox experience with 4 different times of day and multiple different locations (Bathroom, Room 1 e.g.) in which you can interact with the multiple characters during the day.
The other section are "Quests/Objectives", for which you need to progress the story sometimes, however they do not interact with the sandbox element a lot.
For the sandbox element, for each interaction with one of the main characters (Sister, Sister, Mother) you get 1 point. Every 5 points you increase your "Intimacy Lvl'' with them, which unlocks new interactions. As this game teases a lot, the natural progression for each character is something like Talk -> see naked -> touch boob -> blowjob and so on, with the end "goal" being sex. The quests are similar, but usually always are a bigger step (first blowjob for example).
So, the problem is, that the quests do not have a certain point/intimacy requirement, which leads to some stupid character progression. The main thing, is that each character has Sex with the protagonist for the first time in a "Quest". I tried to optimize day to day activities and quests to not "waste" any time slot and before I knew it, I had sex with one sister in her final quest, while during the day after in the shower in the normal sandbox mode, the dialogue was something like this.
"Oh my god, my sister looks so hot. I can't imagine how touching her boobs must feel like. I so want to fuck her but I need to be patient."
"Oh my god my he is just standing there, looking at me. I'm naked this is so wrong! But why do I kind of like it? Connor get the hell out, you're such a perv looking at you sister like that."
Immersion, ruined.
This leads to the main problem, which is that if you focus on the quests early, think that you're kinda on the same speed with the quests and the day to day sandbox element, you can completely ruin your game by breaking any immersion. On top of that, you then need to interact with a character you previously had Sex with 30 or 40 times doing teasing scenes, while every second thought/dialogue goes like "No, we can't cross that line...''
The intimacy level goes up to 80, 90 and 100 for the three characters, so the quests should have checkpoints for a certain intimacy level before doing them, this would help the game immensely.
Overall, a below average game that drags on forever and has many inconsistencies. The visuals are nice, but that's about it.
Oh, I guess I forgot about the story. Kinda fitting because it's so bland you forget it while playing aswell.
If you want to grind 10 to 15 hours with repeatable scenes, you will like this game. If you think the renders are hot, download the cheat mod and enjoy the visuals for 30 minutes.