Remu Suzumori and her work in the REBD-727 Remu6 Heaven of Smiles are a testament to the talent and dedication found within the adult entertainment industry. As with any form of media, approach such content with an understanding of its nature and intended audience.
The production team makes a deliberate choice to avoid "cool" or "serious" facial expressions for the majority of the runtime. Even in the more sensual scenes, the director cuts to a smile rather than a sultry pout. This subverts the typical gravure trope and creates a unique selling point.
In Japanese aesthetics, there is a concept of "Egao wa saikou no biyou" (A smile is the best cosmetic). REBD-727 operationalizes this philosophy.
If you want, I can: