Hi KS:
Just finished this lovely game of yours without skipping.
Here are my thoughts, suggestions, and some constructive criticisms.
1. Character and World building
I really, really enjoy the delicate and nuanced character development and the world-building process. The progression of relationships between each of them in the Japanese underworld setting is slow but natural. Your writing skills are competitive with those in Eternum and/or My Bully Is My Lover: both are popular AVNs. In addition, I found it interesting that you told us not to take everything in this game seriously at the gecko, but the stories and conversations regarding friends and families are so relatable. So far, Ayase and Mikaru are my favorite characters, and the male protangonist is awesome too. However, I am certain that as future updates become available, other girls will have their shining moments!
I also enjoyed your humor and "bloopers" during the credit scenes.It is the very first time I've seen such unique comedic narration in AVNs.
Lastly, there are some hidden hints you planted that may envision the overall direction of the story, and I like that!
2. Models and CGs
Using HS2 model and creative CGs with moans are excellent choices, although the story-writing is so neat to which I forgot there are even H-scenes in this game haha. A minor suggestion would be ... try to fix some minor glitching issues. For instance, in the chronological penultimate H-scene (I don't want to say the name to avoid spoilers), the girl's hair seems to "pierce through" part of her body. I think that's likely a model issue, but it's jut a minor defect and I'm not expert.
3. Music choice
I like the selection of American dream pop, rap, other forms of alternative rock, and Japanese city pop as the major background music genres for this game.
(Maybe I'm nitpicking for the following criticism... I apologize in advance)
However, one criticism I would give aims at the repetition of the same OSTs throughout the game. Take a look at Eternum, and My Bully Is My Lover, the number of soundtracks for either game exceeds 200; each song corresponds to a unique section of the stories in each game. Most players I know enjoy the diversity of OSTs employed in both games, and listening to them is basically a revisit to the fantastic stories. If you are familiar with both games, you will know what I mean exactly.
(I hate to be the guy who compares your game to another but... I don't know if there's a better way to do it)
In comparison, your game employs same soundtracks in certain situations, which make those part of the story a bit less unique. For instance, you used the first 30 seconds of "Extreme by My Merry Machine" in many mystical/stressful situations, or "Comedy Cinematic Inspiring" by Romansenykmusic in situations where something interesting and gleeful happens. In Eternum, during comedic scenes, a variety of music were used, such as E-swings (Jules Gaia/Gavin Luke's music, including Glitz At the Ritz, Extravaganza, etc...), Indies (Staionary Sign's No Need to Confuse Me), Mexican/Latin (Cacion del Mariachi by Antonio Banderas ft. Los Lobos), Funk (Astral Dance by Jimit), and others. Each music describes each comedic scenes in their own unique ways.
Conclusively, your taste of music (those you used in the game as OSTs) is awesome, but the collection of OSTs could be a little bit more diverse to make each subsection of your story more unique and memorable. But suggestions are suggestions. After all, this is your dear game and you should be the one who decides if my suggetions are worth the shot. Maybe other types of non-Japanese genre music might not fit the story...!
4. 中文是官方语言之一是我没想到的。Totally not anticipating that. Many of my Chinese friends love your game!
On final note, I'm looking forward to your future updates of this game! It has so much potential and I believe you will make it outstanding!
I am also setting a Spotify playlist for this game which should be available soon.
Yours sincerely
Pigrider Starwatcher