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: Area no Kishi
Harsher in Hindsight: Suguru saying that what Kakeru lacks is "heart". When you consider what happened to Suguru's heart...
Fridge Brilliance: Suguru wasn't lacking in "heart" and Kakeru gets better after the transplant
Tear Jerker: All the events surrounding Suguru's death and its aftermath. Don't try and say that you didn't cry.