Miel's games are weirdly relaxing in a way, since you always know what you're getting: Hardcore harem sex with hot girls and plenty of fetishes for most trastes (minus urination, I find that shit gross).
Yeah, there's lost potential everywhere here, but guys, if you want story with a bit of porn, search elsewhere, not on Miel's catalogue.
There's katawa Shoujo, Shuffle, Clannad Tomoko after story, ONE, the Doukyuusei series as some recommendations with good to godly stories in no particular order (Clannad hits hard, not recommended for sensitive people, I would've liked that warning).
You want sex with a side of decent story to get You going? Plenty of good nukiges, but I'd recommend both love x holicc and mama x holicc (love is better on story), also euphoria (really hardcore and dark), Fault, Niizuma Koyomi and the after stories, princess lover...
TL;DR, search somewhere else for top Quality, stay for simple (really simple) entertainment.