First of all, i want to say that i loved the game. I've been playing it non-stop since i discovered it, trying to do all the possible routes with all the girls and do the gallery achievements. I also liked the game's design, narrative, and mechanics for the most part, so i congratulate you and thank you for your hard work and i look forward to the next chapter, since at the moment, i finished the game in its story mode and i am currently doing the gallery achievements (although some can't be done if you've already done others in the same save file). I also encountered a few bugs throughout my playthrough, which i'll list in the hope that they'll help you fix them:
Occasionally, when you talk to some characters, their image will get stuck in the middle of the screen, preventing you to see through and cannot be removed unless you talk to another character. It happens to me frequently with Katsune when she is watching at the flower garden in the courtyard, so also when i talk to Madoka in her room.
Another possible bug is that even though I've already met Suki (through the game club), i still can't talk to her when i try to interact with her in her room, telling me that i have nothing to talk to her about, the only form of interaction with her is when i choose to kiss her while i'm at the club. I don't know if this is how it should be or if it's a bug.
Another bug i encountered is when i return to Katsune's world and try to visit Aika in her mansion for the first time. If i try to visit her too late, a maid appears and tells me to come back earlier at another time. After that, my character moves slowly and is able to pass through any obstacles beyond the limits you have imposed on the game, although most of them are empty areas. The bug persists even after returning to the academy and moving on to the next day and the only way to fix it is to revert to a previous saved game.
Another bug i found is a bit curious. When I asked Fuyu out on a date (the first one) and then tried to check her quest inside the backpack, instead of giving me details of said quest, clicking on it triggered a scene of Nana performing oral sex on the protagonist, and when said scene ends, i am teleported out of her room no matter where i am in the school. The funny thing is that I haven't started none of Nana's missions yet, even though i've already met her. The bug happened to me on a Saturday with Kaede's rival mission in progress.
The last bug i found is with Kaede. After doing her personal mission, when i try to have sex with her, she tries to trigger the scene of the protagonist groping her breasts in the kitchen while they are dressed as maids, however, the scene does not appear and the screen turns black instead.
I hope you find the information useful and look forward to the next update.