Usually, I don't enjoy it when the Yandere character is immediately off-putting but I really like it here. It feels realistic in a way to have someone come up to you and say whatever to keep you in their presence.
I also like the way the game implies things. There are implications throughout the game that the MC could be in a simulation or that we're dealing with a self-aware character with Ren, but going along the "normal" route, you almost don't think about it, even with the "I see you" note being right in front of your face every time you save.
This game is very well made.