Made an account just to be able to leave a comment - I feel like indie creators (esp for sort of niche games) don't always get many reviews/feedback, but I think you deserve all the positive feedback you can get! This felt like such a labor of love, and it is amazing that this was released as a free game. Thank you so much for contributing to the male yandere material out there in English, there's definitely a dearth of it, like you said! Came here after reading some recommendations from Reddit for male yandere otome games (gotta scratch that itch every so often) and was so pleased to see a new one in the list!
SPOILERS
Kuro's a great character, and I think it was nice to see the yandere actually be so affectionate (since I feel in most games, there's the "courting" period and maybe a small period where they're actual affectionate and then something snaps). I'm a real sucker for all those kisses, esp ones where the LI does it suddenly/forcefully (not really like non-con per se since the MC does also like him, hopefully you get what I mean) so I think Student ended up being my favorite for that reason. That being said, my favorite plots were the detective and hidden routes (the layers in that last one, oh my goodness!)
I enjoyed reading the comments here about the plot and some of the behind the scenes processes. Makes sense then why I thought Kuro looked kind of girly/shota (e.g. in the mage route, I was like, doesn't that look like female breastplate armor??). No problem, though, because I got so immersed in the story, it didn't really matter. :) The VAs were also great, it was cool to see how many were actually involved in the credits! I feel like all the evil laughs were nailed, and Topper was so fun to listen to (it just fit so well!). The only bit of voice acting that I found a bit jarring was Rabbit - she sounded like a guy to me (can't remember if the VA was a guy or a girl, and I apologize, don't mean any offense). Can't forget about our protag Kuro - sometimes English dub esp for stuff like yandere can sound so cringey but he did a great job, particularly when Kuro gets more emotional/sad. It helped contribute to the feeling of yeah, sometimes he goes crazy but deep down, it's really because he loves you so much and he has all this other angst that you discover in the hidden route.
Speaking of the hidden route, like some other folks mentioned, I found it a bit harder to relate to og!MC and Shiro. I know Shiro has a reason to dislike the MC and Kuro clones but since he was acting like a jerk, I found myself being like, give me Kuro back, haha. In the grand scheme of things, though, it all makes sense and I think there's something to be said for playing as the "clone" the whole time.
Once I realized Anathema was actually Player and not MC, it was interesting to re-interpret everything the Architect said in light of that. Although I'm still a bit confused by what he means at certain bad ends when he says "better you than me" since it's not actually Player dying? Also, Architect, what's your deal with being so upset with me picking the sorta happy ending as my favorite? Surely if you've been watching me so long, you know there's no way I'm going to be like, oh yes, being a lifeless doll is totally my favorite, haha. (Not at all meant to be a slight on your writing, I'm just joking as to the seemingly twisted nature of the Architect)
I also thought it was neat how in the early routes such as Student, you get some bad ends where Kuro is like, oh no, what have I done! But iirc, that doesn't really happen in the later routes, which makes sense since he learns more and more about the system and how it works.
Alright, I think I'm rambling at this point, gonna end with a couple male yandere recs. I know you said you enjoyed MM, not sure if you've also played their other games, Dandelion and Nameless (I'm a fan of Tei from the latter, he's a bit more of the manipulative type). Also, have you heard of the Boyfriend to Death series? (there's 1 and 2, probably runs a bit more yangire than yandere imo but may be up your alley!) There are still some other games I have to catch up on, so we'll see. Anyway, thanks again for making such a great game, looking forward to more of your work in the future!