Hey there,
Sadly, I don't really know another game that would be very similar to mine. What other h-game you might like highly depends on what aspect of the game you enjoy, since it has quite a few different topics and features.
While I don't use social media like X/Twitter, I'm very active on our discord server, where people that like Renryuu might also be able to recommand you other games that they have enjoyed. https://discord.gg/A79WrBq