Hey Maxime, thanks for the post. I'm actually a big fan of visual novels and have done writing work on many in the past, so they're definitely something I'm familiar with. :) I wouldn't really agree that this should be categorised as such, since the visual part of Alcyone is more secondary to the game, but it's a tricky, subjective thing to nail down. Failbetter calls their genre "quality-based choice games" but I don't think that really helps people out much either unfortunately!
I'd consider visual novels to be games, as well as interactive fiction, and I don't really gatekeep on what level of gameplay a game must have to be considered such. It feels a bit counterproductive and starts getting into "real gamers" territory, which is something I've always been averse to.
Either way, I hope you've enjoyed the game! :)