The full version of Nekopara would likely be rated AO, right? Unfortunately, none of the console manufacturers (not just Nintendo, but also Sony and Microsoft) will permit AO-rated titles on their platforms.
Recall back to the development of Rockstar's Manhunt 2 (Wii, PS2, and PSP). During development, the game got an AO rating from the ESRB, resulting in both Nintendo and Sony blocking the publishing of the title. Rockstar had to tone down the game a bit to get an M rating instead, resulting in both Nintendo and Sony allowing it to be published on their systems (however, an uncensored version was released for Windows).
While I agree, though, that AO-rated games (be it for sexual or violent content) be allowed to be published, and let the market decide whether or not it's acceptable, don't expect this stance to change any time soon from Nintendo, Sony, or Microsoft.