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: Night Wizard
Adaptation Displacement: Wonderful example. The anime is based off a tabletop game which is based off an eroge by Alicesoft. The setting of the tabletop game also provided the basis for an eroge by Rune and Cage.