*Spoilers ahead*
Dude, you got an amazing game here. Top quality stuff available here. Amazing job you've been doing!
Your strength is the plot writing. You know how to tell a gripping story, picking the right words for that. Not only that, you also really know how to build a satisfactory character development. It is hard to find VNs with as deep and complex personalities as it was presentend on Crimson High. Before I install your game, I wasn't expecting it to be so immersive. What called my attention was the tone of mystery with perhaps some horror elements that this game seemed like to offer. These factors got me curious and made me install Crimson High (and yes, the fact that it is a NSFW game also counted. I was looking for that).
After installing your game, the first thing you tell me is that there are few H-scenes and they are far between, however, the closer I get to the girls, the more frequent the H-scenes would be. This is exactly what I wanted, a NSFW game which is story-rich, where the intimacy really counts. It is more like the real world, more natural, no artificial stuff. By the way, VN games exist to be story-rich, with a natural pace. Novel is the keyword. It is a pity that many devs forget that.
Your game is gripping. I was hooked to it. I finished the 0.27 version (if I am not wrong) two days ago, still, I cannot stop thinking about it. When I finished the chapter 3 (I believe that my meeting with Uraha was the end of Chapter 3), I felt some sadness, because there wasn't more content (you hadn't released 0.28 yet). It is not usual for me to feel like that after finishing Ren'Py games, but it happened to me when I finished yours.
The girls are beautiful. I don't know whether you used an asset or you created them (I don't know how Koikatsu Illusion works), but they are attractive. It is just that at the beginning I found the characters slightly weird for being too tall or there was something different about their faces or body proportions (I guess that Miko was the first one who transmitted this sensation)... But it wasn't a big deal and I quickly learnt how to like this design or style. Also, I am not sure, but have I seen other Ren'Py games show teeth all the time? I don't know, but it is still okay. As I said, the girls are attractive, and Suzu happened to be my favorite. She is a keeper. I want a marriage route with her XD.
Jun is weird... I know that she is over 18... But her appearance (and immaturity) does bother me :/
Nene also seems kinda young... But it is acceptable. She looks decent for the game. Now, about Jun... I would skip an H-scene with her. Just doesn't feel right.
About all the other girls, they are perfect in the way they are right now. They are gorgeous, hot and fun to be around. Kana is my second favorite, by the way.
Even though I had a lot of fun with your game, I'd like to point out some things that made me scratch my head:
Too many characters: Too many new girls introduced in too short time. Quantity is not quality. I'd like to have more opportunities to deepen my intimacy with the main girls first (which are already many). Let's calm down a little and allow the main girls finish telling their life stories first. While I could be kissing Nagisa due to our strengthened intimacy and progression in her storyline, I am wasting time with Kiri (who is a pain in the a** and I am not interested in learning about her) or I am starting everything from scratch with Quoth, for example.
Scheduling algorithm: There is a non-circular round-robin scheduling algorithm running, whose purpose is to make the MC spend time together with each girl until her time slice is complete. It is a smart way to manage your story with such high amount of characters who are important for the main story's progression. There's nothing wrong about that. However, what makes me scratch my head here is that I developed affinities. For example, I don't like Okami and I kinda don't care about her storyline. I am not interested in her. I would like to prioritize some girls, you know? Go deep into Nagisa's storyline in my own pace, for example. You could ask me who I am preferring at the time. Based on my response, you could anticipate the storyline from the girl I chose. I am not saying that I have to finish her whole storyline at once, but at least I would progress with her more, also increasing our intimacy. It would take shorter time for me to unlock the first scenes with the girl I seem to be preferring at the moment. However, I think there is not much you can do about it and it is also not a big deal. It just feels that it takes too long time for me to progress with the girls who I am interested in.
Jun: Come on, you know what I mean :). But yeah, her storyline is quite interesting and I am looking forward to meeting her Nana, instead of wasting time with Quoth and those three girls group (Aya, Kiri and Chiya). Don't get me wrong, though, I want progress with Quoth and Aya, but let me learn about Nana first, it looks more important.
The main objective seems missed: So... Didn't I join the police to figure out about my deceased mom's case? Isn't it my life purpose now? Shouldn't I be acting to figure out who the murderer is? Except for the very beginning of the game, my mom was mentioned just once, while talking to Uraha for the second time, if I am not wrong.
Is everybody playing dumb?: Okay, so I get heavily injured on the head, get completely healed in 1 day, vampire blood makes me out of mind, I have super strength while feeling mad, I resist Suzu's ability and make she turn into "new sister", I can have telepathic conversations with Kana and Kagome and there is no suspicion that I am a myth? Not even the MC starts to doubt whether he is human or not?
Some things are far-fetched: The idea of hiding too many mythical races from humanity for centuries or milleniums is too far-fetched. It is an awesome background for a nice story that you are telling, but it is not convincing. But I won't focus on this part. Suzu living at the school is also too far-fetched, considering her origins. Of course her family could have more than one house and not everything was burnt. Of course she could have gone to the bank agency earlier. Of course there are more members in the clan she belongs to.
Those points I mentioned are just little ones and didn't really harm my game experience (Except the Jun part). I enjoyed the game and had fun. The game is way longer than I expected and it is good. Your writing skills are just impeccable and are helping me to improve my english skills. I see that you released 0.28, but I won't play it now. I just can't. I don't have time. But, I will certainly play your game again in the future to see how it ends. When you finish this game, please, don't stop on it. Create more projects.
I follow other pretty nice projects here on Itch, but all of them are no complete yet and take time to release a small update. Meanwhile, I look for games with as good quality as these I follow, but I fail miserably. If you stop creating these projects, you would be missed for sure.