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.
OT3: Manga Only: A rare canonical example in that with all DearS now fertile, Ren, Miu, China and even Nyu, all want to participate in 'baby making' with Takeya.
Unfortunate Implications: Ren, the female lead, wears an over-sized dog collar around her neck and is quite insistent about being treated as a slave. The series actually looks into why this is, helping to lift some of the "unfortunate" off of it.