Fuminori Sakisaka is the main protagonist of the visual novel 'Saya no Uta' (Song of Saya). After surviving a traumatic car accident, he undergoes experimental brain surgery that drastically alters his perception of the world, causing everything and everyone to appear grotesque and monstrous, except for a mysterious girl named Saya. Fuminori's struggle to retain his sanity and humanity forms the core conflict of the story, as he becomes increasingly isolated and desperate in his search for solace.