These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Crescendo ~Eien Dato Omotte Ita Ano Koro~
Fetish Retardant - Not only some people get into it more for the plot than the porn — but the body proportions, the odd epitions of sex positions and the Only Six Faces-like design might be quite the turn-offs.
The Woobie - Everybody but Kaho and Tomonori. Not that there's anything wrong with that, but it may make pursuing her ending after seeing Kyoko's a little awkward.