this movie teaches us that we'll never know how much the things, even the small ones, that we do to someone means to them. sometimes even the small things that we forget in one second after we did it can be the reason why someone stays alive. as stupid as it sounds, sometimes the kind thing that someone said to us even as a lie can make us think that maybe life isn't really that bad after all, that even after all the bad things that happened, life is worth living and fighting for. because as what Aiko said, "Sometimes, all we need is someone to look us in the eye and remind us we exist" even we knew very well that they don't actually mean it.