I'm sure I've had all of the endings for Rin (Good, Neutral, Bad).But I'm still missing a single scene.
It's the one between "Things You Can't Give Up" and "Rose-Tinted Glasses".
Little help here?
Depending on your choices at the first few choice point you either quit the art club later or you don't.
The Flowchart needs some serious studying to understand, but basically it doesn't make any difference what you choose on Rin's path up to the scene in the atelier unless you're going for 100%. Your choices before then have zero effect on the ending.
The scene you're looking for is called "BADAAN!!" (or something like that). I just realised I had some missed dialogue in that scene too, despite having 100% a long time ago.
Emibro, Hanabro, [Lilly Lover], Rin Kin, Feminist, Two-timer
(Passively working on my KS YouTube series. Someday...)