This is by far the best sex game I've ever played, since it has a stunning story (especially the transformation abilities and that dead-end part with Rin and the boss pissbang) and provides all my favorite fetishes (big dicks, smegma, piss, cum, scat, mainly oral scenes and women, who really enjoy that all).
If I could change anything, I would love to see far more cock piss scenes, a new spit fetish option, some cuckolding scenes (big dick dominates girls as well as men with tiny cocks) and new scenes with my favorite character Heinrich. I really love how he treats and dominates women with his perfect dick.
Oh, it probably doesn't fit into the storyline, but what about a certain degree of cock face slapping?
Despite that, keep or even increase all that dirty smegma scenes, best of the best!