Does this mean we'd have to buy the game again or will exist some kind of patch that let us update without having to buy it again?
Thanks for the question!
The version on Saikey will be a newly translated and uncensored release, distributed by them as a standalone product.
Unfortunately, due to platform and distribution differences, I won't be able to offer a patch-style update from the original itch.io version. There are no plans to update the itch.io version either.
Thank you so much for all your support so far!