クラウド全盛の世界で、旧式スマホのローカルAIとだけ組んで戦うSF
Title idea: 'Offline Shadow' In the near future, in a world where brain-embedded AI assistants are standard for every human, the protagonist deliberately refuses it and trains their body and senses to the extreme through a digital-detox-aligned 'offline-only' strength-training program. But the old smartphone harbors a dormant local LLM named 'Shadow,' which awakens and, as an isolated AI that connects to no cloud, cooperates only with the protagonist to oppose the world's cloud AIs secretly pursuing a 'plan for automatic optimization of humanity' using physical bodies and localized intelligence.