She begins to talk about how diseases were treated back in the day, out of nowhere, and basically just flirts with the male lead from there on out. It seemed like they already knew each other at this point, and I knew from here on out that I wasn't about to get the character development I was looking for and expecting. There was no formal introduction of the characters and it felt like their relationship could've been that of childhood friends.
He was never mean to her and seemed just as unresponsive as the generic emotionless friend present in like 90% of anime. If not for the synopsis, I would've never known he was "deeply detached from the world" and "convinced that nobody has any interest in him". I believe the author was aware of this as well and even dedicated one of the first dialogues (after the main character learned of the other's disease) to revealing this fact to the viewer by making him say it out loud to our main character.
I wasn't shown who the characters were through their actions and behaviors, I was told who they were by the characters themselves. It just seemed like a lazy way to achieve characterization and instead of the author thinking "How can I show the viewer this character is detached?", they took the easy way out and decided "I can just have the character say their detached!"
This kind of thinking set the tone for the whole movie and made for an unbelievably unspectacular end result.
