Saejima's story begins with a prison riot. You'll need to navigate the prison, fighting off guards and other inmates. Saejima's combat is slow but incredibly powerful; focus on charged attacks and grabs. Follow the on-screen prompts and the mini-map to find your escape route. There will be several quick-time events (QTEs) during the escape sequence, so be ready to press the correct buttons.
After escaping the prison, Saejima finds himself in the snowy mountains of Tsukimino. This introduces his 'Another Drama' hunting mechanic. You'll be guided through a tutorial on tracking animals, setting traps, and using your rifle. Your first objective is to hunt a deer for food. Pay attention to the wind direction and your scent trail to avoid scaring off prey. Successfully hunting will provide you with materials for crafting and food to restore health. This initial hunting segment is crucial for understanding the unique gameplay loop of Saejima's chapters.