BBBen there are several major issues in the game:
1. during the first major stage 2 scene with iku. when you butt fuck her, it becomes an animation. at that point it won't progress. you need to both spam keys on the keyboard and also alternate clicking on the animation box and the text box for it to ever so slowly progress through the scene.
2. if you use the map to click on a room to fast travel to a location. let us say kitchen. and on the way to the kitchen you encounter an event. Then the event will trigger twice and get messed up blending. This is especially bad if you have multiple different events triggering on the way. for example in the final day where you are told by rio to do REDACTED and you tell her to gather everyone in the billiards room. If you click on that room then there are several scenes on the way that will get messed up. It is also particularly bad if you have an event that relocates you.
3. in combat, if the text parser does not understand the bodypart you typed in "fumi attack bodypart" it should NOT default to just "fumi attack". it should instead tell you "I don't know what bodypart is". this one is quite annoying.
Actually in general the combat requiring you to TYPE is godawful and the worst part of this game. It should really be based on buttons you click.
4. when beating the final boss it lists possible endings to choose from those you unlocked. I had unlocked bonus endings 11, 12, and 13 on my first playthrough. However it only showed two of them just as I beat the final boss.
4b. when loading the save done at that point it will not show me my options.
4c. in the scenario from 4b, if I use any commands in the text parser other than a number it will now clarify what I need to do. Using a number will either go to that ending if it is unlocked. or if not unlocked it will instead show a list of ONLY the non-bonus endings.
that is, the first time I beat the boss it showed endings 1,2,3,5,7,11,12. (omitting 13 which I had unlocked). when loading that save it showed nothing. when typing a number of an invalid ending like 4 it will show me the choices of 1,2,3,5,7. omitting 11,12, and 13.
I could still blindly type 11,12, and 13 in that save to play those endings
5. If MC has lust over 10 it says "there is a chance of..." but the chance is 100%, it always results in -5 relationship if you try to discipline, chat, or compliement. (not anything else mind you). Worse though is that the game lies to you. Rio tells you to get the girls to relieve you, but that does not work. Rio's initial blowjob is the only sex act that provides relief. Any other sex act actually RAISES your personal lust score instead of lowering it. Meaning it is utterly crippling in just how many cold showers you need to take. There are even times where your cold shower is interrupted by fumi who spoil it further. This is quite annoying.
6. For some reason one of the days just randomly did not have night service. IIRC it was day... I think 15? where Rio warns you that the rising is happen soon and you better make sure to get all the girls ready
7. love can't go over 100, but it can fall. and rio keeps on bringing over that slimy asshole to offer cuck bullshit that forces me to either drop the girls from 100 love or drop rio from 100 love. It is annoying. I told him to fuck off, and yet rio keeps on bringing him back again and again to redo the offer. and every time I lose 5 love points with rio dropping her down from 100. what an utter waste of time
8. I get that you pretend to be Kenji Momogami this entire story. But why aren't you allowed to input your own choice of "real name"? that one is not a bug but is a weird oversight.