Ok, after going through 90% of the game i have three issues:
- if you didn't meet a girl that is required for progression you are out of luck, there is nothing in the game to point you where you need to go for them and without a walkthrought the game is unplayable. Currently there are two ways around it: 1. Check every single location at every single time block and hope for the best. 2. Check the "Small guide" section in the OP.
- the guide get's stuck when there is some prerequisite to the next step other than meeting a girl, for example Chitose got stuck after getting her 2nd book with "something needs to happen", i've finished almost everything and she was still at this stage in the guide, meanwhile all i needed to do was talk to her
- you need to be in a specific location (and sometimes a time block) to progress time, usually in your room. Clicking through navigation to get back to the room, pass the time and back to the girl is a massive waste of time and a chore.
Edit: the quiz on Japanese history was also some BS, i know it's a weeb game, but come on.