I get the message, and it's a very heartwarming one at that. And, for an HTML5 visual novel it shows a fair amount of care into creating that mesage with graphics. But I do have to note, it does have an amount of stiltedness in the dialouge. I can deal with this, but it could use some work. You see, when you're trying to do anything with as story, you need to understand Immersion. Any story, big or small, needs to seem real, or at the very least, stay within its own bounds. It needs to stick to its own rules, or the immersion can break. This means the thing you were trying to create/cause, whether a lesson learned or an emotional resopnse, can, at the very least, be a little scuffed from execution. The way characters present their struggles in a very disconnected way from how they look and norrmally act makes the immersion break and the moral a little harder to swallow. I get that this is a short tale, but look at your other game, Compassion. You're able to make a dying bird teach me a moral with it's pain in less than a minute. The thought that went into that is awe-inspiring. And it sticks, because it stands by it's own rules. The bird doesn't randomly chirp in it's sentences, does it? It's keeps its atmosphere of sending a message, and does it well.
TL;DR: The immersion of the story is broken by the dialouge's uncomfortable stating of people mental setbacks. Pretty good for people who arent receptive of that though, and you've shown you can keep an atmosphere with your game Compassion.