Thank you!
And yes, I'm working on a few things for the Hud and UI update that should make it easier to know when you're missing scenes. I also hope to fill up the replay gallery with all the missing girls, main candidate or not. As for in-game hints, the yellow text usually indicates there is possibly a scene. I understand if it's a pain to have to go through all the dialogue, so hopefully the replay gallery will tell you chronologically where it's missing.
Note and minor spoiler:
Juna is the only character where you have to replay a scene 3 times instead of 2 to get all 3 scenes for one event. This happens in the city intro.