im ngl. I'm on day 7 with xyx, my final route to play, and I'm just now realizing the dark shading around his mouth is not his lips! At least, I think the illustrator was goin for that. Same goes for nightowl while I played his route. The open mouth illustrations for both had me so confused. My eyes definitely played tricks on me.
EDIT: my eyes keep understanding and switching the shading from open mouth to xyx's lips