Haruka Tooyama, a twelve-year-old possessing extraordinary precognitive powers, becomes a coveted asset for profit-hungry corporations due to her unparalleled ability to foresee the future. After falling prey to a kidnapping scheme, Haruka relies on her gift to locate an unlikely savior in a blind man navigating the bustling streets of Tokyo. Despite initial skepticism, the blind swordsman showcases his formidable combat prowess by effortlessly dispatching her assailants with a concealed blade. Aware of the perpetual threat looming over her, Haruka implores the enigmatic swordsman to safeguard her, binding them together under an unspoken vow of protection: 'Until Death Do Us Part'.