Non-Ren'py engines are always nice to see, but there were some technical/presentation issues that sort of overwhelmed the entire reading experience for me. The animation for text appearing is really, really distracting, especially on fast text speeds; you just kind of click, watch the tornado of letters whirl around for a while, and then read, which kills the rhythm. I think text-based games really should make the act of reading as unobtrusive as possible.
Also, maybe most importantly, bug report: on my setup (Firefox+Linux), something in the embedded canvas container gained and displayed focus, forcing me to play the game with a harsh orange overlay over it. The art direction looks solid from the screenshots, but I sadly wasn't able to enjoy it like that.
The sprites/models/whatever you want to call them are really good, and I like the designs! The big issue with them is that as the animations stop, the sprites are – depending on the scene – either fully static or looping distracting idle animations where they rotate their heads and blink rapidly, and it looks weird either way. I think a middle ground of something way subtler would have been preferable.
With all of this hindering the reading experience, the story took me a while to get into. I would maybe call it sparse and brief to a fault; the combination of the super-concise descriptions and the relatively distanced dialog between two characters who've just met each other and don't have strong voices or conflict between them doesn't really give the reader a lot to work with. The stylized environments evoke a mysterious mood, but it almost feels like they're doing all the work – for a visual novel, the "novel" comes off as an afterthought. Some good sound design would also have helped here a lot, I think; it's a good way to ground the reader in what the characters are experiencing.