The evolution of art styles within a single story can mirror a relationship's health. Early chapters might be sketchier, rougher, with harsher shadows reflecting anxiety or uncertainty. As trust builds, the linework can become cleaner, more confident. I've seen a comic where during a depressive episode, the artist switched to a stark, monochromatic, ink-heavy style for a chapter, making the world feel bleak. When the partner helps pull them out, color slowly seeps back in. The visual medium lets the reader feel the emotional state of the relationship through the art itself, not just the events drawn. It's a meta-layer of storytelling that's pure genius.