You should read this guide: How to Use the Controller – H-Game18

You should read this guide: How to Register an Account on H-Game18.xyz

Q: Is there a Japanese emulator that helps bypass the issue of missing Japanese fonts on my PC?
A: Yes! You can try using Locale Emulator. It allows you to emulate not just Japanese, but many other locales as well. For more details, check out this guide: Setup Locale Emulator

Q: How can I play KiriKiri engine games on my phone?
A: You can follow the detailed instructions in this guide: Using KiriKiroid 2 to Play Games on Mobile

Q: How can I play PC games on my phone?
A: Check out the step-by-step instructions in this guide: How to Use Joiplay to Emulate PC Games on Android.