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.
What Do You Mean, It's Not For Kids?: At a first glance, it might look like a cute kid's story, with the animal characters, bright, colorful artwork, and a beginning serial that looks like something out of Bambi. Take a skip down to Serial 11 sometime.
The Woobie: Kacey could arguably be this, as before the story begins she's someone who has parents who petition repeatedly for her to be terminated, doctors who have no idea how to deal with her "Condition", and someone who suffers so much social anxiety that it's extremely difficult for them to make friends, let alone find dates and have intimate moments with; not only that, but she's forced to undergo shock therapy, the painful way to relieve oneself on Cygnus should you not be able to relieve your body's sexual desires.
Christine does help her get a little better, but that doesn't mean that cruel things still don't happen to her.