Sorry, my english might seem a bit awkward but it is not my first langage.
I've played lots of VN but I'm not usually into otome games (unfortunatelly those tends to be too cliché and not credible enough for my tastes). I must say I didn't know I'd enjoyed the yandere trope so much before I played your game^^ This was a good surprise.
I enjoyed the concept of your game and I liked Kuro a lot (he was not just a stupid trope but a real fleshed out character). He made me blush as much as he scared me. I think it's a good thing because it means you portrayed him in a credible way, and the character fulfilled his purpose.
As a writer myself I know that feedbacks can be very usefull and I think that it's a shame that indies creators receive too few of them. Because some works would deserve more support. I think you deserve to know that your VN is good and enjoyable.
The writing is nice, the story kept me interested until the end, the sprites are beautifull even if sometimes the different styles don't match very well with each other (not sure my sentence means something lol).
I would personally have prefered to see the same sprite (one for kuro and one for the MC) with just a different hairstyle and outfit in each scenario for more immersion (and because it would have been more coherent with the ending). I'm curious to know why you chose different sprites (I don't want to spoil anything, but I think you see what I mean ^^).
Finally, I have only two majors complaints. I can't express the first one without spoiling the whole thing, so... I shall not write it here (if you want we could chat about it somewhere else).
I think you are not responsible for the second one (it's certainly the engine's fault) but even if I have a very good pc the game is very long to start. I don't really mind, but I think it's worth mentioning.
Anyway... I enjoyed the ride a lot. I came for the horror elements and I ended in love with a yandere ;)
My favorite route was the detective route. I can explain why in more details if you want. My fav Kuro was the one during the detective one too, and during the princess one (I mean the personnality, because my fav design was the student route Kuro he he). My fav side character was Isabelle from the detective route too (I wish I could have kissed her instead of you know who)^^ Ah and my fav MC... hum... I'm not sure, i enjoyed them all except the MC in the student route (she's a bit dense lol) and the one in the gamer route (even if I enjoyed this route a lot. This scenario is very well built).
Have you ever considered publishing this game on steam? It would give you faaaaar more visibility, especially if you add few trophies (for ex one trophy per bad end. It's quite easy to do this with steam).
If you have difficulties to find female voice actors for the other versions of your game, or even for this one (I might be wrong but I think rabbit has a male voice althought she is a girl? Maybe you didn't find an actress) I could give you a hand (or my vocal chords in this case). I have a mezzo-soprano voice, but you must know that I have a french accent ;) so I'm not sure if I can help.
Have a nice day, keep on the good work and don't forget to dream ;)