(WARNING: spoilers for the ending of the rival's route. I don't think itch has spoiler tags, unfortunately. Beware, those who have not finished the rival's route of the main story.)
1. Out of sheer morbid curiosity, I romanced an idol and then went on to pick the sex tape option for the rival route. I'm surprised that the idol I romanced didn't acknowledge it, and in the case of marrying her (which I assume means the relationship goes public), surprised that it wasn't more of a scandal or outright career-ender. Was that overlooked, or will it be added later, or was it not included for simplicity's sake?
2. This is more of a self-indulgent suggestion that might be out of the game's scope, but would it be possible to romance the rival? Maybe as a post-1.0 DLC or update? I find the rival's chemistry with the player incredibly compelling and I'd love to have something a bit more permanent than the apparent one-off at the end of the rival's route. Unless more rival events happen in chapter VII, in which case I'm a dunce.
3. Some of the idols' dialogue when you fail to influence them to delay graduation feel unnecessarily harsh. I had one accuse me of never caring about her, and that felt a bit over the top considering I had level 4 friendship with her. Just say you owe me nothing more lmao. Maybe the possible dialogue could be based on friendship and/or romance level? "You never cared about me anyway" feels a lot more appropriate if you only have level 0-1 relationship with the idol.
Lastly: I love this game so much. Even if you ignore all the above, I still think this is a damn good game with a damn good story.