Cant fathom a better nsfw game. The only thing it lacks is audio for the "H-events" (whatever that means I assume horny). My solution was having two monitors and playing another game on the side called darling touch which does happen to have decent audio. Not a sponsor or an ad, just a rec ;
I think it is because the audio for visual novels end up bloating up the file size. Similarly sized visual novels are often 4 times as big in data size because of audio effects, and the more effects are added, the more will the size grow. Sticking to just BGM tracks provides atmosphere while keeping the file size lower. Personally Id be fine with both. But this is just my speculation.