Preferences
Settings
Adjust language, AI, sound, local engine, and save settings. Everything remains free to use.
Language
Choose the language used in the story and menus.
AI / API Key
API keys are optional. Without a key, Koiiro still runs with local scenarios and quality gates.
Local Engine
When your device GPU/CPU can help, it assists reply choices, intent detection, quality checks, and light rewrites. Local scenarios still work without an API key.
No large model is loaded automatically. This checks WebGPU diagnostics and, only when available, a short Device AI critic diagnostic.
Sound / BGM
Soft background music can gently deepen Koiiro's atmosphere. It plays quietly so it will not interrupt your conversations.
BGM files are not bundled yet. Once audio files are added, you can enable background music here.
Current status
Not bundled
Current track
Not playing
Save Data
Advanced
Developer tools, prompt-shortening, and test log export live here so normal play stays simple.
Privacy
Settings and save data stay on this device. API keys are stored locally and are not used for payments. Koiiro has no external payment, donation, or subscription flow.
Legal / Credits
Koiiro is free and ad-supported. These pages explain the R15 content boundaries, privacy model, and asset credits.
Content Notice
This R15 romance experience may include affectionate closeness and gentle sensual atmosphere. It excludes minors, coercion, violence, cruelty, and explicit sexual imagery.