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.
In episode 9.5, Miu catches Ren "Watching porn to study Takeya's preferences in the earthling ways of sex."
Ren: "Holy cow, that looks pretty complicated..."
Miu: "IS SHE SPINNING!?"
Heartwarming Moments — Child!Takuya throwing flowers over a crying Child!Neneko. "You're beautiful! You look like a princess!"
Ho Yay — In the manga. Mildly hinted at with Khi and Takeya (Khi doesn't mind being 'ordered' by Takeya...). Played straight with (to the displeasure of) Hirofuni and Xaki. Khi's relationship with 'Young Master' also had some shades of this too.
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.