Dream about yoU changes more than the portrait when you choose the protagonists’ genders

The gender choice in Dream about yoU is advertised to reach the wording as well as the portraits. The official description lets you configure both the protagonist and partner, with changes to sprites, dialogue, forms of address and CGs.

That makes the pair the unit of customization. It is more specific than changing one avatar image while leaving the surrounding text unspecified. The source does not list the available options or show a rewritten line, however, and it does not establish that different configurations create different endings or puzzle answers. Presentation changes should not be inflated into a claim about branching agency.

The story sends the pair into dreams from a future where rising seas have pushed humanity onto artificial islands under ELYSION. Those are the advertised narrative circumstances in which the configured characters appear. If customizing both leads matters to your reading, the useful promise is consistency across their images and how they are addressed. The decision changes who is presented on the journey; what else it changes still needs evidence.