Thank you for spreading the word about this! Do you have a backup plan to host this or any of your other games in the advent that itchio goes belly-up?
Last I checked, Booth (BoothPM? It's partnered or owned by Pixiv?) allows NSFW comics and games. I feel like your VNs and Comics that have been translated to Japanese would do really well over there! Other than that, the options are pretty slim aside from just making your own personal site and host it on somewhere like NeoCities or something.