I've played the game jam version as far as it allowed me to go after ignoring errors, which was up until Miko and Byakuren. Even though I'm now playing through Cold Open as well, I'll rate the game based on the unfinished version as a form of fairness toward the other participants, I hope you don't mind!
I'll start by saying that I like the concept! I've already seen VNs where you impersonate a bartender and it is a solid choice, as it allows you to add some gameplay elements in the form of mixing/choosing drinks. This makes the gameplay feel a little less samey and adds replayabilty. The choices are not always straightforward to interpret, which adds a bit of challenge, something that I appreciated.
I like the artstyle of the game: the backgrounds are clean and the characters look so good! It's a shame that in this version most of them are too big and don't fit in the screen. They also often overlap and sometimes don't even show up. I'm sure these problems were all due to a lack of time, as I see they've been fixed in the latest version of the game.
The audio effects are nice, I don't think I've seen other developers in this game jam add voice effects to the characters' lines! It's a good compromise between full voice acting and no voices at all, especially considering the scope of this jam.
The stories are all really enjoyable, I'm just sad I couldn't finish the game beacuse of errors! They all involve LGBTQA+ people being silly or serious one way or another, so I'd say you definitely got the theme right! The game touches multiple topics about gender identity and sexual/romantic attraction and they fit right into the narrative! I'm also convinced M is supposed to be someone important, but I haven't figured that out yet...
I want to say a few lines about the finished version as well. Once fixed and polished, the character portraits are GORGEOUS, it's such a shame you couldn't make it in time! At first, I immediately fell in love with your rendition of Rinnosuke, then I saw Mamizou and found her just as good, but then the more characters showed up, the more I loved the art! They all look wonderful! The music is also very fitting, I really felt the difference between the two versions of the game.
I haven't played through the final version fully, but I'll definitely update this comment or add another reply once I have. In any case, I really like your game and can't wait to finish it!
EDIT: Ok, so it turns out I had very little of the story left to play! The way you represented the credits with all the characters coming back to thank/say hi to you was really cute! I still haven't figured out who M is supposed to be though. Are they an existing character or just a stand-in for the player? I thought the former, since the dialogues hint at M having a definite backstory, and they do have a non-generic character design, but I couldn't tell. Anyway, I enjoyed the story very much! I didn't want it to be over and wished it to be a bit longer, but you still made an incredible work, considering it was for a two-week game jam!