I breezed right past it at first, because while it doesn't work with their canon ages, it does work with their apparent ages. It was only three or four clicks later that I got hit with the "wait a minute..." feeling, when I remembered that officially they're 18, 19, and 20.
Also, since I forgot to say it earlier: I've enjoyed a lot of games on this site, but this is the first one where I feel genuinely invested in the story. Like, I'm actually curious enough about where this is going and what's going on that I've been paying attention to the background characters in each scene, in case I recognize them later.