This game is indeed surprisingly fun. And there is a lot the you can do, even to some hilariously ridiculous extents. I even posted a video on my YouTube channel about a little manipulative trick I discovered in the game, if you're interested:
Yandere AI Girlfriend Simulator ~ With You Til The End 世界尽头与可爱猫娘 ~ 病娇AI女友 Powered by ChatGPT » Comments