I've read this story somewhere before, in an IRC channel somewhere long forgotten. I liked it back then as well, and I still like it now. It's been quite a while, though, so it's a bit disappointing it's exactly as I remember it.
What first appear to be grammar errors or sloppy writing become interesting when you grasp the story and read it anew, and I quite like that.
There's good attention to detail in the art, with each character having a unique appearance. I liked the Domo arigatou Mr Robotto shirt, too. The presentation is also very good, and I'm curious what software was used. This doesn't look Ren'Py. Music was also very good.
It's short, but not all works need to be long to be interesting. Someone not long ago told me writing something short and engaging is more difficult than long and engaging, so I'm not alone in this philosophy. I do feel like the ending kinda spoonfeeds the reader what the story is about, but on the whole it's a good five to ten minutes of reading, with beautiful presentation, relaxing music and a compelling story.
Slight comment though: "a usual", not "an usual". I read that line multiple times because I thought it said, "an unusual", and that'd be weird. It happens as he meets the old lady.
Second comment: when you scroll back after a sprite appears (or at least as the old lady's sprite appears), the sprite doesn't erase and is stuck, then appears again.